Question

Jeremy shouts in front of a hill. He hears the echo 1.8secs later. The v of sound in air is 300ms-1. What is the distance btw Jeremy and the hill ?

Why is the answer 297 instead of 594 ?

Answer 1

I think you simply used -
distance = velocity * time

Please note that the sound wave made a two way trip.

Answer 2

It's neither of those
velocity = distance/time
distance = velocity * time = 300*1.8
The echo has to travel to hill and back again
Check your calculations

Answer 3

Owhhh right two ways ! Missed that out. Thanks :)

Answer 4

:)

Answer 5

but 300*1.8 = 540m

SO he is 270 m from hill - not 297m....

Answer 6

Oh, pardon me, it was 330 ms-1
In this case, u're absolutely correct too :) thanks !