A car approaches a hill at a constant speed. When it is at a distance of 96m it blows a whistle, whose echo is heard by the driver 0.65 later. If the speed of sound in the air is 300m/s, Calculate the speed of the car?
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Answer:
30m/s
Explanation:
If the speed of engine is v, the distance travelled by engine in 5s will be 5v and hence the distance travelled by sound in reaching the hill and coming back to the moving driver
=900+(900−5v)
1800−5v
So, the time interval between original sound and it's echo
t=
330
(1800−5v)
=5⇒v=30m/s
please mark me as a brainleist
Answer:
sorry but your values are contradicting that car is moving towards it.