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PHYSICS

JAMB 2018 - Question 39

Physics 2018 JAMB Past Questions - Question 39: A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 340ms−1, how far is he from the hill?

Choose the correct answers from the options given.

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 340ms−1
, how far is he from the hill?

A: 66m

B: 136m

C: 264m

D: 528m

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Correct Answer

Explanation

2 × Distance = speed × time
2 × Distance = (340) × (0.8)

= 272/2
Distance = 136m