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.
| 1) Find the radius of a circle whose circumferene is 13.2cm. ___cm Answer:_______________ |
| 2) Find the radius of a circle whose circumferene is 220cm. ___cm Answer:_______________ |
| 3) Find the radius of a circle whose circumferene is 144cm. ___cm Answer:_______________ |
| 4) Find the radius of a circle whose circumferene is 17.6cm. ___cm Answer:_______________ |
| 5) Find the radius of a circle whose circumferene is 88cm. ___cm Answer:_______________ |
| 6) Find the radius of a circle whose circumferene is 146cm. ___cm Answer:_______________ |
| 7) Find the radius of a circle whose circumferene is 8.8cm. ___cm Answer:_______________ |
| 8) Find the radius of a circle whose circumferene is 176cm. ___cm Answer:_______________ |
| 9) Find the radius of a circle whose circumferene is 160cm. ___cm Answer:_______________ |
| 10) Find the radius of a circle whose circumferene is 26.4cm. ___cm Answer:_______________ |
| 1) Find the radius of a circle whose circumferene is 13.2cm. Answer: 2.1cm SOLUTION 1 : Given, c = 13.2cm. Circumference of the circle = 2πr. 13.2 = 2 x x r ⇒ (13.2 x 7) ÷ (2 x 22) ⇒ 92.4 ÷ 44 r = 2.1cm. |
| 2) Find the radius of a circle whose circumferene is 220cm. Answer: 35cm SOLUTION 1 : Given, c = 220cm. Circumference of the circle = 2πr. 220 = 2 x x r ⇒ (220 x 7) ÷ (2 x 22) ⇒ r = 35cm. |
| 3) Find the radius of a circle whose circumferene is 144cm. Answer: 22.9cm SOLUTION 1 : Given, c = 144cm. Circumference of the circle = 2πr. 144 = 2 x x r ⇒ (144 x 7) ÷ (2 x 22) ⇒ r = 22.9cm. |
| 4) Find the radius of a circle whose circumferene is 17.6cm. Answer: 2.8cm SOLUTION 1 : Given, c = 17.6cm. Circumference of the circle = 2πr. 17.6 = 2 x x r ⇒ (17.6 x 7) ÷ (2 x 22) ⇒ 123.2 ÷ 44 r = 2.8cm. |
| 5) Find the radius of a circle whose circumferene is 88cm. Answer: 14cm SOLUTION 1 : Given, c = 88cm. Circumference of the circle = 2πr. 88 = 2 x x r ⇒ (88 x 7) ÷ (2 x 22) ⇒ r = 14cm. |
| 6) Find the radius of a circle whose circumferene is 146cm. Answer: 23.2cm SOLUTION 1 : Given, c = 146cm. Circumference of the circle = 2πr. 146 = 2 x x r ⇒ (146 x 7) ÷ (2 x 22) ⇒ r = 23.2cm. |
| 7) Find the radius of a circle whose circumferene is 8.8cm. Answer: 1.4cm SOLUTION 1 : Given, c = 8.8cm. Circumference of the circle = 2πr. 8.8 = 2 x x r ⇒ (8.8 x 7) ÷ (2 x 22) ⇒ 61.6 ÷ 44 r = 1.4cm. |
| 8) Find the radius of a circle whose circumferene is 176cm. Answer: 28cm SOLUTION 1 : Given, c = 176cm. Circumference of the circle = 2πr. 176 = 2 x x r ⇒ (176 x 7) ÷ (2 x 22) ⇒ r = 28cm. |
| 9) Find the radius of a circle whose circumferene is 160cm. Answer: 25.5cm SOLUTION 1 : Given, c = 160cm. Circumference of the circle = 2πr. 160 = 2 x x r ⇒ (160 x 7) ÷ (2 x 22) ⇒ r = 25.5cm. |
| 10) Find the radius of a circle whose circumferene is 26.4cm. Answer: 4.2cm SOLUTION 1 : Given, c = 26.4cm. Circumference of the circle = 2πr. 26.4 = 2 x x r ⇒ (26.4 x 7) ÷ (2 x 22) ⇒ 184.8 ÷ 44 r = 4.2cm. |