Sasi Math (Revised for 1024)

Scroll:Mensuration >> circumference of cylinder and cone >> ps (4133)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 36m. Diameter of the base is 30m . and height of the cylinder is 21m. Find the cost of canvas needed to make the tent, if the cost of canvas is 14.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

21m

36m

30m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 49m. Diameter of the base is 46m . and height of the cylinder is 15m. Find the cost of canvas needed to make the tent, if the cost of canvas is 10.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

15m

49m

46m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 36m. Diameter of the base is 30m . and height of the cylinder is 24m. Find the cost of canvas needed to make the tent, if the cost of canvas is 14.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

24m

36m

30m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 81m. Diameter of the base is 46m . and height of the cylinder is 24m. Find the cost of canvas needed to make the tent, if the cost of canvas is 10.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

24m

81m

46m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 81m. Diameter of the base is 44m . and height of the cylinder is 24m. Find the cost of canvas needed to make the tent, if the cost of canvas is 14.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

24m

81m

44m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 36m. Diameter of the base is 42m . and height of the cylinder is 21m. Find the cost of canvas needed to make the tent, if the cost of canvas is 12.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

21m

36m

42m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 81m. Diameter of the base is 42m . and height of the cylinder is 24m. Find the cost of canvas needed to make the tent, if the cost of canvas is 14.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

24m

81m

42m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 64m. Diameter of the base is 46m . and height of the cylinder is 21m. Find the cost of canvas needed to make the tent, if the cost of canvas is 14.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

21m

64m

46m

Answer:_______________

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 64m. Diameter of the base is 32m . and height of the cylinder is 27m. Find the cost of canvas needed to make the tent, if the cost of canvas is 12.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

27m

64m

32m

Answer:_______________

10)

A circus tent is to be erected in the form in the from of a cone surmounted on a cylinder. The total height of the tent is 49m. Diameter of the base is 30m . and height of the cylinder is 18m. Find the cost of canvas needed to make the tent, if the cost of canvas is 15.50/ m2. (take π = $\frac{22}{7}$ ) (write answer the nearest round number)

18m

49m

30m

Answer:_______________

21m

36m

30m

Answer: 52635

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 30m

Radius, r = 15m

Height, (h) = 21m

Conical Part :

Radius, r = 15m

Height, h₁ = 36 - 15 = 21m

Slant height, l = √ h₁²+ r²

√ 21² + 15²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 15 x ( 2 x 21 + 35)

= $\frac{22}{7}$ x 15 x 77

= $\frac{25410}{7}$

Area of the canvas= 3630.00m²

Now, the cost of canvas per Sq.m = 14.50

Thus, the total cost of the canvas = 3630.00 x 14.50 = 52635.

15m

49m

46m

Answer: 49335

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 46m

Radius, r = 23m

Height, (h) = 15m

Conical Part :

Radius, r = 23m

Height, h₁ = 49 - 23 = 26m

Slant height, l = √ h₁²+ r²

√ 26² + 23²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 23 x ( 2 x 15 + 35)

= $\frac{22}{7}$ x 23 x 65

= $\frac{32890}{7}$

Area of the canvas= 4698.57m²

Now, the cost of canvas per Sq.m = 10.50

Thus, the total cost of the canvas = 4698.57 x 10.50 = 49335.

24m

36m

30m

Answer: 56736

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 30m

Radius, r = 15m

Height, (h) = 24m

Conical Part :

Radius, r = 15m

Height, h₁ = 36 - 15 = 21m

Slant height, l = √ h₁²+ r²

√ 21² + 15²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 15 x ( 2 x 24 + 35)

= $\frac{22}{7}$ x 15 x 83

= $\frac{27390}{7}$

Area of the canvas= 3912.86m²

Now, the cost of canvas per Sq.m = 14.50

Thus, the total cost of the canvas = 3912.86 x 14.50 = 56736.

24m

81m

46m

Answer: 62997

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 46m

Radius, r = 23m

Height, (h) = 24m

Conical Part :

Radius, r = 23m

Height, h₁ = 81 - 23 = 58m

Slant height, l = √ h₁²+ r²

√ 58² + 23²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 23 x ( 2 x 24 + 35)

= $\frac{22}{7}$ x 23 x 83

= $\frac{41998}{7}$

Area of the canvas= 5999.71m²

Now, the cost of canvas per Sq.m = 10.50

Thus, the total cost of the canvas = 5999.71 x 10.50 = 62997.

24m

81m

44m

Answer: 83213

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 44m

Radius, r = 22m

Height, (h) = 24m

Conical Part :

Radius, r = 22m

Height, h₁ = 81 - 22 = 59m

Slant height, l = √ h₁²+ r²

√ 59² + 22²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 22 x ( 2 x 24 + 35)

= $\frac{22}{7}$ x 22 x 83

= $\frac{40172}{7}$

Area of the canvas= 5738.86m²

Now, the cost of canvas per Sq.m = 14.50

Thus, the total cost of the canvas = 5738.86 x 14.50 = 83213.

21m

36m

42m

Answer: 63525

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 42m

Radius, r = 21m

Height, (h) = 21m

Conical Part :

Radius, r = 21m

Height, h₁ = 36 - 21 = 15m

Slant height, l = √ h₁²+ r²

√ 15² + 21²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 21 x ( 2 x 21 + 35)

= $\frac{22}{7}$ x 21 x 77

= $\frac{35574}{7}$

Area of the canvas= 5082.00m²

Now, the cost of canvas per Sq.m = 12.50

Thus, the total cost of the canvas = 5082.00 x 12.50 = 63525.

24m

81m

42m

Answer: 79431

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 42m

Radius, r = 21m

Height, (h) = 24m

Conical Part :

Radius, r = 21m

Height, h₁ = 81 - 21 = 60m

Slant height, l = √ h₁²+ r²

√ 60² + 21²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 21 x ( 2 x 24 + 35)

= $\frac{22}{7}$ x 21 x 83

= $\frac{38346}{7}$

Area of the canvas= 5478.00m²

Now, the cost of canvas per Sq.m = 14.50

Thus, the total cost of the canvas = 5478.00 x 14.50 = 79431.

21m

64m

46m

Answer: 80707

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 46m

Radius, r = 23m

Height, (h) = 21m

Conical Part :

Radius, r = 23m

Height, h₁ = 64 - 23 = 41m

Slant height, l = √ h₁²+ r²

√ 41² + 23²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 23 x ( 2 x 21 + 35)

= $\frac{22}{7}$ x 23 x 77

= $\frac{38962}{7}$

Area of the canvas= 5566.00m²

Now, the cost of canvas per Sq.m = 14.50

Thus, the total cost of the canvas = 5566.00 x 14.50 = 80707.

27m

64m

32m

Answer: 55943

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 32m

Radius, r = 16m

Height, (h) = 27m

Conical Part :

Radius, r = 16m

Height, h₁ = 64 - 16 = 48m

Slant height, l = √ h₁²+ r²

√ 48² + 16²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 16 x ( 2 x 27 + 35)

= $\frac{22}{7}$ x 16 x 89

= $\frac{31328}{7}$

Area of the canvas= 4475.43m²

Now, the cost of canvas per Sq.m = 12.50

Thus, the total cost of the canvas = 4475.43 x 12.50 = 55943.

10)

18m

49m

30m

Answer: 51881

SOLUTION 1 :

Cylindrical part

Diameter, 2r = 30m

Radius, r = 15m

Height, (h) = 18m

Conical Part :

Radius, r = 15m

Height, h₁ = 49 - 15 = 34m

Slant height, l = √ h₁²+ r²

√ 34² + 15²

=√ 784 + 441

= √ 1225 = 35m.

Total area or the canvas needed

= CSA of the cylindrical part + CSA of the conical part

= 2πrh + πrl = πr(2h + l)

= $\frac{22}{7}$ x 15 x ( 2 x 18 + 35)

= $\frac{22}{7}$ x 15 x 71

= $\frac{23430}{7}$

Area of the canvas= 3347.14m²

Now, the cost of canvas per Sq.m = 15.50

Thus, the total cost of the canvas = 3347.14 x 15.50 = 51881.