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An engine approaches a hill with a const...

An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is :

A

`10 m//s`

B

`20 m//s`

C

`30 m//s`

D

`40 m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
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