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A engine is approaching a hill at consta...

A engine is approaching a hill at 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 s`. If the speed of sound is `340 m//s`, calculate the speed of the engine.

A

`"20 m s"^(-1)`

B

`"30 m s"^(-1)`

C

`"15 m s"^(-1)`

D

`"10 m s"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
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