Question

22
Take = wherever it is not given.]
7.
1. Multiple Choice Questions (MCQ) Choose the correct option.
If the ratio of the radii of two circles is 8:15, the ratio of their circumferences is
(a) 15:8 (b) 4:15
(c) 8:15
(d) 15:4
(ii) The radius of a circular field is 210 m. The cost of fencing its circumference at
the rate of 1.25 per metre is
(a) 1600 (b) 1650
(c) 1750 (d) 1700
(iii) A car makes 50,000 revolutions to travel a distance of 121 km. The diameter
of the wheel of the car is
(a) 55 cm (b) 66 cm
(c) 88 cm (d) 77 cm
2. Find the circumference of a circle whose radius is :
() 10.5 cm
(ii) 4.55 cm
(iii) 4.2 cm (iv) 7 cm
3. Find the circumference of a circle whose diameter is:
(ii) 28 cm
(ii) 10 cm
(iv) 7 cm
(i) 14 cm
4. Find the radius of a circle whose circumference is :
(ii) 22 cm
(iii) 66 m
(iv) 30.8 m
(0) 44 m
5. Find the perimeter of each figure :
28 cm
17 cm
17 cm​

Answer 1

1. A

2. C

3. B

4. D

5. A

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