A body has speed of V,2V and 3V in first 1/3 of distance 𝑆, seconds 1/3 of 𝑆 and third 1/3 of 𝑆 respectively. Its average speed will be

Question : A body has speed of V,2V and 3V in first 1/3 of distance 𝑆, seconds 1/3 of 𝑆 and third 1/3 of 𝑆 respectively. Its average speed will be

(A) 𝑉

(B) 2V

(C) \dfrac{18}{11}V

(D) \dfrac{11}{18}V

Answer : option (C)

Solution :

A body has speed of V,2V and 3V in first 1/3 of distance 𝑆, seconds 1/3 of 𝑆 and third 1/3 of 𝑆 respectively. Its average speed will be
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