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A person standing on an open ground hea...

A person standing on an open ground hears the sound of a jet aeroplane , coming from north at an angle `60^(@)` with ground level ,But he finds the aeroplane right vertically above his position , if V is the speed of sound , speed of the plane is :

A

`(v)/(2)`

B

`(2v)/(sqrt(3))`

C

`(sqrt(3))/(2)v`

D

`v`

Text Solution

Verified by Experts

The correct Answer is:
A
`(d)/(V_("Sound"))=(d cos 60)/(Va)`
`V_("aeroplane")=(V_"Sound")/(2)`
.
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