# An object is moving in a circle of radius 100 m with a constant speed of 31.4 ms−1. What is its average speed for one complete revolution?

Question : An object is moving in a circle of radius 100 m with a constant speed of 31.4 ms−1. What is its average speed for one complete revolution?

(A) zero

(B) $31.4ms^{-1}$

(C) $3.14ms^{-1}$

(D) $\sqrt{2}\times 31.4ms^{-1}$

Answer : option (B)

Solution :

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