A vehicle runs on a straight road of length 'L'. It travels half the distance with speed V and the remaining distance with speed (3V)/(2) . Its average speed is

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Correct answer: D. (6V)/(5)

Total distance is L . Time taken to travel the first half distance is t_1 = (L/2)/(V) = (L)/(2V) . Time taken to travel the second half distance is t_2 = (L/2)/(3V/2) = (L)/(3V) . Total time taken is t = t_1 + t_2 = (L)/(2V) + (L)/(3V) = (5L)/(6V) . Average speed is v_ avg = Total distance Total time = (L)/((5L)/(6V)) = (6V)/(5) . Answer: (6V)/(5)

A vehicle runs on a straight road of length 'L'. It travels half...

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