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PHYSICS

JAMB 2014 - Question 27

Physics 2014 JAMB Past Questions - Question 27: A boy receives the echo of his clap reflected by a nearby hill 0.8s later .How far is he from the hill?

Choose the most appropriate option for the gap .

A boy receives the echo of his clap reflected by a nearby hill 0.8s later .How far is he from the hill?

A: 66m

B: 136m

C: 264m

D: 528m

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Correct Answer

Explanation

V 2X/ttherefore = vt/2where x is distance of the observer from t = time to receive the echo and v = velocity of sound.therefore x = vt/2 = 340x0.8/2 = 136.0m