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July 11th, 2018, 12:00 AM  #1 
Senior Member Joined: Aug 2014 From: India Posts: 343 Thanks: 1  What was the ratio of the speed of the man and the speed of sound?
A gun was fired from the same place at an interval of 3 hours. A man who was walking towards the place from where the gun was fired heard the gunshots at an interval of 2 hours 59 mins. What was the ratio of the speed of the man and the speed of sound? I draw the diagram of moving man walking beside the gun bullets at two time intervals: From here, how to proceed ? Last edited by Ganesh Ujwal; July 11th, 2018 at 12:03 AM. 
July 12th, 2018, 09:21 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,804 Thanks: 970  
July 12th, 2018, 09:55 AM  #3  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,209 Thanks: 517 Math Focus: Calculus/ODEs  Quote:  
July 12th, 2018, 10:17 AM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,804 Thanks: 970 
Plus I see nothing wrong with looking at it as Car1 (the bullet) leaving from A (path AB) and Car2 (the walker) leaving from B. 

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man, ratio, sound, speed 
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