Sasi Math (Revised for 1024)

Scroll:Distance, Time and Speed >> Distance, Time & Speed >> ps (646)

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.

Prem and Chellamal started driving from the same place but in opposite directions along a straight road.
After driving for 4h, they were 520 km apart. Prem’s average speed was 60 $\frac{km}{h.}$
What was Chellamal’s driving speed
$\frac{km}{h}$

Answer:_______________

Sriram and Tulasi started driving from the same place but in opposite directions along a straight road.
After driving for 2h, they were 230 km apart. Sriram’s average speed was 65 $\frac{km}{h.}$
What was Tulasi’s driving speed
$\frac{km}{h}$

Answer:_______________

Sriram and Poongodi started driving from the same place but in opposite directions along a straight road.
After driving for 4h, they were 440 km apart. Sriram’s average speed was 50 $\frac{km}{h.}$
What was Poongodi’s driving speed
$\frac{km}{h}$

Answer:_______________

Karna and Jeevini started driving from the same place but in opposite directions along a straight road.
After driving for 4h, they were 400 km apart. Karna’s average speed was 50 $\frac{km}{h.}$
What was Jeevini’s driving speed
$\frac{km}{h}$

Answer:_______________

Kalai and Poongodi started driving from the same place but in opposite directions along a straight road.
After driving for 3h, they were 300 km apart. Kalai’s average speed was 50 $\frac{km}{h.}$
What was Poongodi’s driving speed
$\frac{km}{h}$

Answer:_______________

Narayanan and Indra started driving from the same place but in opposite directions along a straight road.
After driving for 2h, they were 250 km apart. Narayanan’s average speed was 65 $\frac{km}{h.}$
What was Indra’s driving speed
$\frac{km}{h}$

Answer:_______________

Moorthi and Indra started driving from the same place but in opposite directions along a straight road.
After driving for 4h, they were 500 km apart. Moorthi’s average speed was 65 $\frac{km}{h.}$
What was Indra’s driving speed
$\frac{km}{h}$

Answer:_______________

Chidambaram and Savithri started driving from the same place but in opposite directions along a straight road.
After driving for 4h, they were 420 km apart. Chidambaram’s average speed was 60 $\frac{km}{h.}$
What was Savithri’s driving speed
$\frac{km}{h}$

Answer:_______________

Anand and Swathi started driving from the same place but in opposite directions along a straight road.
After driving for 2h, they were 210 km apart. Anand’s average speed was 50 $\frac{km}{h.}$
What was Swathi’s driving speed
$\frac{km}{h}$

Answer:_______________

10)

Kalai and Thamarai started driving from the same place but in opposite directions along a straight road.
After driving for 3h, they were 345 km apart. Kalai’s average speed was 45 $\frac{km}{h.}$
What was Thamarai’s driving speed
$\frac{km}{h}$

Answer:_______________

SOLUTION 1 :

← Prem	Chellamal →

Starting Point

Step 1:	Distance travelled by Prem after 4 hours	→	4 h x 60 $\frac{km}{h}$
		=	240 km

Step 2:	Distance travelled by Chellamal after 4 hours	→	520 km - 240 km
		=	280 km

Step 3:	Chellamal's speed	→	280 km ÷ 4 h
		=	70 $\frac{km}{h}$

SOLUTION 1 :

← Sriram	Tulasi →

Starting Point

Step 1:	Distance travelled by Sriram after 2 hours	→	2 h x 65 $\frac{km}{h}$
		=	130 km

Step 2:	Distance travelled by Tulasi after 2 hours	→	230 km - 130 km
		=	100 km

Step 3:	Tulasi's speed	→	100 km ÷ 2 h
		=	50 $\frac{km}{h}$

SOLUTION 1 :

← Sriram	Poongodi →

Starting Point

Step 1:	Distance travelled by Sriram after 4 hours	→	4 h x 50 $\frac{km}{h}$
		=	200 km

Step 2:	Distance travelled by Poongodi after 4 hours	→	440 km - 200 km
		=	240 km

Step 3:	Poongodi's speed	→	240 km ÷ 4 h
		=	60 $\frac{km}{h}$

SOLUTION 1 :

← Karna	Jeevini →

Starting Point

Step 1:	Distance travelled by Karna after 4 hours	→	4 h x 50 $\frac{km}{h}$
		=	200 km

Step 2:	Distance travelled by Jeevini after 4 hours	→	400 km - 200 km
		=	200 km

Step 3:	Jeevini's speed	→	200 km ÷ 4 h
		=	50 $\frac{km}{h}$

SOLUTION 1 :

← Kalai	Poongodi →

Starting Point

Step 1:	Distance travelled by Kalai after 3 hours	→	3 h x 50 $\frac{km}{h}$
		=	150 km

Step 2:	Distance travelled by Poongodi after 3 hours	→	300 km - 150 km
		=	150 km

Step 3:	Poongodi's speed	→	150 km ÷ 3 h
		=	50 $\frac{km}{h}$

SOLUTION 1 :

← Narayanan	Indra →

Starting Point

Step 1:	Distance travelled by Narayanan after 2 hours	→	2 h x 65 $\frac{km}{h}$
		=	130 km

Step 2:	Distance travelled by Indra after 2 hours	→	250 km - 130 km
		=	120 km

Step 3:	Indra's speed	→	120 km ÷ 2 h
		=	60 $\frac{km}{h}$

SOLUTION 1 :

← Moorthi	Indra →

Starting Point

Step 1:	Distance travelled by Moorthi after 4 hours	→	4 h x 65 $\frac{km}{h}$
		=	260 km

Step 2:	Distance travelled by Indra after 4 hours	→	500 km - 260 km
		=	240 km

Step 3:	Indra's speed	→	240 km ÷ 4 h
		=	60 $\frac{km}{h}$

SOLUTION 1 :

← Chidambaram	Savithri →

Starting Point

Step 1:	Distance travelled by Chidambaram after 4 hours	→	4 h x 60 $\frac{km}{h}$
		=	240 km

Step 2:	Distance travelled by Savithri after 4 hours	→	420 km - 240 km
		=	180 km

Step 3:	Savithri's speed	→	180 km ÷ 4 h
		=	45 $\frac{km}{h}$

SOLUTION 1 :

← Anand	Swathi →

Starting Point

Step 1:	Distance travelled by Anand after 2 hours	→	2 h x 50 $\frac{km}{h}$
		=	100 km

Step 2:	Distance travelled by Swathi after 2 hours	→	210 km - 100 km
		=	110 km

Step 3:	Swathi's speed	→	110 km ÷ 2 h
		=	55 $\frac{km}{h}$

10)

SOLUTION 1 :

← Kalai	Thamarai →

Starting Point

Step 1:	Distance travelled by Kalai after 3 hours	→	3 h x 45 $\frac{km}{h}$
		=	135 km

Step 2:	Distance travelled by Thamarai after 3 hours	→	345 km - 135 km
		=	210 km

Step 3:	Thamarai's speed	→	210 km ÷ 3 h
		=	70 $\frac{km}{h}$