Question

Shweta observes lightining in her area . She hears the sound 4s after she observed lightening . How far is she from the place where lightning occurs if speed of sound in air is 330 m/s

Answer 1

She is at 1.32 kilometers from the place where lightening occurs.

Explanation :

Since the speed of the light is very high, therefore she can see the lightening instantly. Which means that she can hear the sound after 4 sec of lightening.

We know that,

Distance = speed x time

Given speed = 330 m/s,

time = 4 sec,

Hence,

Distance =  330 x 4 = 1320 m = 1.32 km

Hence she is at 1.32 kilometers from the place where lightening occurs.

Answer 2

Explanation:

Distance=Speed×time

Time=4s

Given speed=330m/s

Distance=330m/s×4

=1320

converting meter to kilometres 1.32

is the answer.