Exams › SSC CGL (Prelims) › General

The ratio of the circumference to the diameter of a circle is given as 3 : 5. If the circumference of the circle is 6 cm, what is the radius of the circle?

1. 1.8 cm
2. 10 cm
3. 15 cm
4. 5 cm

Correct answer: 5 cm

Solution

Using the given ratio: C/d = 3/5. With C = 6 cm, we get d = 6 x (5/3) = 10 cm. Therefore radius = d/2 = 5 cm.

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