Question

A iron ball is dropped in a well of depth 320 m and a sound is heard after 8.5
seconds. Find the speed of sound in m/s.​

Answer 1

Explanation:

90 km per hour is the answer of this question

Answer 2

A stone is dropped in a wel...

PHYSICS

A stone is dropped in a well of depth 500m and a sound is heard after 80/7 seconds. Then speed of sound is: [g=10m/s

2

]

ANSWER

here, S=−500m [ we take reference level is in initial position of stone]

u=0, a=−g =−10

use formula , S=ut+

2

1

at

2

−500=0−

2

1

×10×t

2

t

2

=100=>t=10sec

but sound is heard after 45/4=11.25sec

hence, time taken to reach 500m depth =11.25−10=1.25sec .

now speed of sound = distance/time

= 500/1.25=400m/s

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