1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

# Find the distance of cloud from you when you hear a thunder 3 seconds after the lightning is seen. Given speed of light =3x108 m/sec, speed of sound = 330m/sec. Also draw the figure.

Asked by rkjha_in 22nd March 2015, 9:56 PM
We know that the speed of light is greater than the speed of sound. Thus, lightning will reach in no time but the thunder will be heard 3 seconds after the lightning by the man.
We know that the lightning and the sound travels the same distance, let us consider that as 'd'.
Let 'v1' and 't1' be the velocity of the lightning and the time taken by it to reach the man. Similarly, 'v2' and 't2' be the velocity and the time taken by the thunder to reach the man.

Thus, the cloud is at a distance of 990 m from the man.
Answered by Expert 11th December 2017, 7:23 PM
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10

You have rated this answer /10