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From a cloud at an angle of 30^(@) to th...

From a cloud at an angle of `30^(@)` to the horizontal, we hear the thunder clap 8 s after seeing the lightening flash. What is the height of the cloud above the ground if the velocity of sound in air is `330 m//s` ?

Text Solution

Verified by Experts

The correct Answer is:
1.320 km
In h is cloud height then distance travelled by sound is
`l = h cosec (30^(@)) = 2h`
`t = (2h)/(v)`
`8 = (2h)/(330)`
`h = 300 xx 4 = 1320 m = 1.320 km`
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