PhysicsSound wavesJAMB
A boy claps his hands in front of a wall and hears the echo 1.5 s later. If the speed of sound is 330 m/s, how far is he from the wall?
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Answer: B. 247.5 m
The sound travels to the wall and back: d = 330 × 1.5 ÷ 2 = 247.5 m.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.