The differences between the circumference and diameter of a circle is 60 cm, then radius is
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 14 cm.
The differences between the circumference and diameter of a circle is 60 cm
⇒ circumference of circle = 2πr, Diameter = 2r.
⇒ 2πr - 2r = 60
2r(π - 1) = 60
2r(22/7 - 1) = 60
2r(15/7) = 60
2r = 28
r = 14