A man is standing not exactly at the centre, in between two parallel walls separated by a distance 990 m. He fires a gun and hears the first echo after 2 s, the time taken to hear 3rd echo after firing is __________ s, (take velocity of sound in air 330 ms–1)
(a) 5                   (b) 6                (c) 7                    (d) 8

Dear Student ,
Here is a link which will help you to solve this question with proper explanation .
https://www.meritnation.com/ask-answer/question/a-man-stationed-between-two-parallel-cliffs-fires-a-gun/sound/6893054

Regards

  • -2
???
  • -1
What are you looking for?