Question

A question Here....!
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A man fires a gun and hears its echo after 5s. The man then moves 310 m towards the hill and fires the gun again.This time if he hears the echo after 3s, calculate the speed of sound.
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Answer 1

Answer:

Explanation:

V = 2d/t [formula]

Solution :

V = 2 X 310/2 [when he moves 310m towards the cliff he hears the echo

 

                              after 3s. So  5 - 3 = 2s ]

V = 310m/s

Total distance from the cliff :

  Hope it helps you

Answer 2

Heyaa☺️❤️

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Case1:-

t = 5sec

Distance = 2d m

speed = v m/s

So, v = $2d/5$

Again,

Case2 :-

t = 3sec

distance = (2d - 620) m

speed = v m/s

v = $(2d - 620)/3$

Equating both the cases as the speed comes out to be the same. We get,

2d/5 = (2d -620)/3

d = 775m

So, v = (2× 775)/5 (from case1)

v = $310 m/s.$

Thankuhh for asking!!☺️

#BeBrainly✌️✌️

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