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If the difference between the circumference and diameter of a circle is 60cm, then the redius of the circle is :

If the difference between the circumference and diameter of a circle is 60cm, then the redius of the circle is : Correct Answer 14 cm

Hints: ধরি, বৃত্তের ব্যাসার্ধ r 2πr - 2r = 60 2r ( π - 1) = 60 r = 60 / ( 2×3.1416 - 1) r = 14.008 r = 14.00 cm

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