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August 11th, 2011, 09:49 PM  #1 
Newbie Joined: Jun 2010 Posts: 24 Thanks: 0  Average speed problem
A cyclist travels from Paris to the Louvre at an average speed of x km/h. find the time taken in term of x ? On his return journey from louvre to Paris, he decreases his average speed by 3 km/h. Find the time taken in return journey in terms of x ? if the difference between the times is one hour 20 minutes, find the value of x ? 
August 11th, 2011, 10:14 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,204 Thanks: 511 Math Focus: Calculus/ODEs  Re: Average speed problem
A cyclist travels from Paris to the Louvre at an average speed of x km/h. find the time taken in term of x ? Let d be the distance from Paris to the Louvre. On his return journey from the Louvre to Paris, he decreases his average speed by 3 km/h. Find the time taken in return journey in terms of x ? if the difference between the times is one hour 20 minutes, find the value of x ? 

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