Question

A boy standing in front of a cliff claps and hears an echo at the end of 3s find the distance between the cliff and the boy when the speed of sound in air is 342 m/s

Answer 1

The distance between the boy and glif is 1026m

Explanation.,

342*3=1026m

Answer 2

Answer:

510 m

Explanation:

Let d be the distance of cliff from the boy . Therefore total distance covered by sound to go to cliff and come back after reflection  =2d ,

given v=342m/s,t=3s ,

WKT, distance = speed×time ,

              2d= v×t =342×3 ,

              hence, d=(342×3)/2

=513m

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