priya clapped her hand near a cliff and heard the echo after 5 seconds.if the speed of the sound be 330m/s,then find the distance of the cliff from priya?
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Actually distance covered by echo sound is double the distance between observer and source .now,
2 x distance between cliff and priya=velocity of sound x time
=330 x 5 =1650 m
hence distance between cliff and priya =1650/2=825 m
Where d is the distance between the cliff and Priya.
So , the total distance traveled by echo = 2d
v = velocity/speed of sound = 330m/s
t = time taken = 5 sec
∴ 2 d = 330 × 5
2d = 1650
d = 1650 ÷ 2
d = 825
∴ Distance of the cliff from priya = d = 825 m
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