**Question **: If a car covers 2/5 th of the distance with v1 speed and 3/5 th distance with v2 , then average speed is

(a) \dfrac{1}{2}\sqrt{v_{1}v_{2}}

(b) \dfrac{V_{1}+V_{2}}{2}

(c) \dfrac{2v_{1}v_{2}}{v_{1}+v_{2}}

(d) \dfrac{5v_{1}v_{2}}{3v_{1}+2v_{2}}

**Answer **: The right answer is (d)

**Solution **:

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