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July 10th, 2018, 11:00 PM  #1 
Senior Member Joined: Aug 2014 From: India Posts: 355 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 10th, 2018 at 11:03 PM. 
July 12th, 2018, 08:21 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,414 Thanks: 1024  
July 12th, 2018, 08:55 AM  #3  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Quote:  
July 12th, 2018, 09:17 AM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,414 Thanks: 1024 
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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