Question

a boy is playing with a ball on the roof of a building of 480 m high from the ground. suddenly, the ball slips from his hand and falls into the well on the ground. the water level in the Well is 20 m below the ground and he hears the sound of the ball hitting water at 11.5 second from the instant of the slip. the speed of the sound in air is (take g=10ms2)
(A) 333.33 M/S
(B) 350 M/S
(C) 340.25 M/S
(D) none of these

Answer 1

None of these is the write answer.

Answer 2

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⏬⏬Here is the Answer⏬⏬


⭐⭐ (C) 340.25 M/S ⭐⭐


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