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A car is moving with a speed of the 72 K...

A car is moving with a speed of the `72 Kmh^-1` towards a hill. Car blows horn at a distance of 1800 m from the hill. If echo is heard after 10 s.the speed of sound `("in" ms ^-1)` is

A

300

B

320

C

340

D

360

Text Solution

Verified by Experts

The correct Answer is:
C
`S=((u+v)/2)t`
`1800=((20+v)/2)10`
`:. V =340ms^-1`
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