Question

A man standing some distance away from a cliff, blows a whistle he hears the echo 1.10 seconds later if the speed of the sound in air is 350m/s. Calculate how far he is from the Cliff

Answer 1

d=?
v=350m/s
t=1.10s

2d= v×t
2d= 350×1.10
2d=350
d=350÷2=175m

Answer 2

speed of sound in air=350 m/s
time period = 1.10 sec or 1.1 sec
2 distance = speed of sound * time period
2 d= 350*1.1
2d=385
d=385/2
distance = 192.5