Question

A girl claps and hears the eco after reflection from a cliff which is 660 m away from her. If the velocity is 330 m/sec .Calculate the time taken to hear an echo

Answer 1

$<b><i><u>Hey mate ✨$

Given,

v = 330m/s

d = 660m

t = ?

We know that,

in echo

v = 2d÷t

So,

t = echo ÷2d

$t = 330 \div 2 \times 660 \\ t = 330 \div 1320 \\ t = 0.25s$

Hope it helps ✔