Question

To estimate the width of a valley, a climber starts a stopwatch as he shouts. He hears an echo from the opposite side of the valley after 1.0s. The sound travels at 340m/ s. What is the width of the valley?

Answer 1

`\tt w/d=(v.t)/(2)`

w = width/distance

v = velocity

t = time

input the value:

`\tt w=(340* 1)/(2)=170~m`