Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Question 1. A deep well has water at a depth of 80m below the top of the well. A stone is dropped from the top. If the speed of sound is 320m/ s then the sound hitting the water is heard after how many seconds later?

Question 1. A deep well has water at a depth of 80m below the top of the well. A stone is dropped from the top. If the speed of sound is 320m/ s then the sound hitting the water is heard after how many seconds later?

Answers (1)

Total distance travelled by the stone = 80m

Total distance travelled by sound = 80m= 160m

Time taken by stone to reach the well

t_1=\sqrt{\frac{2s}{g}}=\sqrt{\frac{160}{10}}=4sec

Time taken by sound to reach the top

t_2=\frac{80}{320}=0.25sec

Total time taken to hear the sound

t=t_1+t_2=4+0.25=4.25sec

Posted by

Safeer PP

View full answer

Similar Questions

Latest Question