Question

A car is moving with a velocity "u" on a road running parallel to a row of buildings. The distance between row of
buildings and road is 'd'. The driver sounds the horn, he receives the echo after a time— . (V is velocity of
sound)
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Answer 1

Answer:

i think the answer should be 2d/t .....

Explanation:

the distance is 2because the echo covers 1single echo by traveling two times i.e object to person and person to object....

i hope it helps you