A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 340ms\(^-1\), how far is he from the hill?
- 66m
-
136m
- 264m
- 528m
The correct answer is: B
Explanation
2 × Distance = speed × time
2 × Distance = (340) × (0.8)
= 272/2
Distance = 136m
There is an explanation video available .