A boy clapped near a rock and after 3 seconds he heard an echo. If the – McqOptions

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1.	A boy clapped near a rock and after 3 seconds he heard an echo. If the speed of the sound is 346 ms-1, then how far is the boy from the rock?
A.	219 meter
B.	341 meter
C.	346 meter
D.	519 meter
Answer» E.

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