1.

A man standing 50m in front of a wall and claps his hands. What is the time between the clap and the echo, given that the speed of sound in air is 330m/s

Answer» <html><body><p><strong><em><u>Each clap must occur at the instant the echo of the <a href="https://interviewquestions.tuteehub.com/tag/last-3704365" style="font-weight:bold;" target="_blank" title="Click to know more about LAST">LAST</a> one <a href="https://interviewquestions.tuteehub.com/tag/returns-1187977" style="font-weight:bold;" target="_blank" title="Click to know more about RETURNS">RETURNS</a>. Claps occur every (3 <a href="https://interviewquestions.tuteehub.com/tag/seconds-1198593" style="font-weight:bold;" target="_blank" title="Click to know more about SECONDS">SECONDS</a>)/5 = 0.6 <a href="https://interviewquestions.tuteehub.com/tag/second-1197322" style="font-weight:bold;" target="_blank" title="Click to know more about SECOND">SECOND</a>. The sound travels to the wall and back, or 100+100 m = 200 m in this time (= 0.6 sec). Hence velocity (distance per unit of time) is (200 m)/(0.6 sec) = 333.33 m/sec.</u></em></strong></p><p></p><p></p></body></html>


Discussion

No Comment Found

Related InterviewSolutions