Question

The distance between a boy and a hill is 250 metres. If the boy shouts, after
how long will the echo be heard?
​

Answer 1

Explanation:

500metres

will be

echo

250+250

=500m

Answer 2

Answer:

1.5 s (approx.) and distance of echo traveled is 500m.

Explanation:

As you have not mentioned the speed of sound in the air, let's assume it to be 330 m/s.

Distance = velocity x time

Time = Distance / Velocity

        = 250/330

        = 0.75 s (approx.)

This is the time for the sound from the boy to the hill.

An echo is formed from returning of the sound from the hill back to the boy.

So, the time for the echo to be heard will be 2 times the time taken by sound from boy to reach the hill.

So, echo time = 1.5 s

Distance traveled will be 250 + 250 = 500m. We are adding because it is returning back to the boy.

Please mark my answer as the brainliest...