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?
A
66m
B
136m
C
264m
D
528m
Verified Correct Answer: B.
Physical Principles & Numerical Solution
2 \times Distance = speed \times time
2 \times Distance = (340) \times (0.8)
= 272/2
Distance = 136m
Source: Myschool Past Questions Archive (Record #47767)