SOLUTION: a cyclist travels 50 miles at an average rate, r, then travels 5 miles per hour faster during the return trip. write an expression that describes the total time of the trip.

Question 993133: a cyclist travels 50 miles at an average rate, r, then travels 5 miles per hour faster during the return trip. write an expression that describes the total time of the trip.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
a cyclist travels 50 miles at an average rate, r, then travels 5 miles per hour faster during the return trip. write an expression that describes the total time of the trip.
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Avg speed of a round trip = 2*r1*r2/(r1 + r2) where r1 & r2 are the 2 speeds.
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Avg speed of this RT is 2r*(r+5)/(2r+5)
t = d/r

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