Question

two men a and b standing in front of the cliff. a is 330m away from the cliff and b is 330 m away from a. the man at a sounds a whistle continously for half a second.(velocity=330m/s).1)what is the duration of hearing a echo by a?2)what is the time gap between the two sounds that b hear?

Answer 1

velocity = 2d / time 
time = 2d / velocity 
time for a = 660 / 330 
time = 2 sec 

the time gap =

sound by a =  330 / 330 
                    = 1s 

and that of echo 

                       =990 / 330 
                       = 3s 

the time gap = 3s - 1s = 2s 
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Answer 2

Answer:

Explanation:

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