Question

If a boy blows a whistle near a wall then he hears echo in 2 sec then find distance of boy from the
wall(speed of sound =330 m/s)

Answer 1

Answer:

A boy stands 85 m infront of a high wall and then blows a whistle. Calculate the time interval when he hears an echo.

Answer 2

Answer:

good answer my friend

Explanation:

i didnt even thought of it