Question

1:) A gun is fired from a distance of 1.2km from a hill
the echo of the sound is heard at the same place after 7.1s
what will be it's speed??

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Answer 1

Explanation:

A gun is fired from a distance of 1.2 km from a hill

The echo of the sound is heard back at the same place after 8 seconds

Change 1.2 km to 1200 meters, round trip will be 2400 meters

2400/7.1 = 338.02 m/sec is the speed of sound

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