A boy receives the echo of his clap reflected b... - JAMB Physics 2014 Question
A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill?
A
528m
B
66m
C
136m
D
264m
correct option: c
Time for echo both ways = 0.8
Therefore time for echo in 1 way = 0.8/2 = 0.4
Distance = Speed x time
Distance = 340 x 0.4
Distance = 136m
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