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# Two friends A and B are standing a distance x apart in an open field and wind is blowing from A to B. A beats a drum and B hears the sound t1 time after he sees the experiment is repeated . This time B hears the drum t2 time after he sees the event. Calculate the velocity of sound in still air V and the velocity of wind u.

Asked by valavanvino1011 29th August 2018, 8:12 PM
when B is hearing the drum beat of A, we have,  V+u = (x/t1) .................(1)
when A is hearing the drum beat of B, we have,  V-u = (x/t2) ..................(2)

By adding (1) and (2) we get,  V = (x/2) [ (1/t1) + (1/t2) ]
By subtarcting (2) from (1), we get,  u = (x/2) [ (1/t1) - (1/t2) ]
Answered by Expert 31st August 2018, 11:01 AM
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Tags: velocity