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Question

A body covers the first 1/3 of the distance with a velocity of 2 m/s, the next 1/3 with 3 m/s and the rest of the distance with 6 m/s. The average velocity in m/s for covering the whole distance is (assume that the body travels with constant velocity in all the parts in a straight line)

A
3
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B
113
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C
83
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D
43
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Solution

The correct option is A 3
Total distance of the journey =d
Total time taken for the journey = d32+d33+d36
Average velocity = dd6+d9+d18= 3 m/s

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