Nigerian Scholars » Past Questions » Physics » A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^-1\)...

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^-1\)...


Question

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^-1\), how far is he from the hill?

Options

A) 66m

B) 136m

C) 264m

D) 528m

Explanation:

Distance = speed × time
= (3400) × (0.812)
= 136m


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