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A sightseeing bus travel miles to a scenic overlook. The rate returning is twice the rate going, and the travel time for the job round-trip is 2 hours.Find the rate for the return part of the trip.
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Sagot :

let                                          ANSWER
rate going        = x               =2/3 hours/mile
rate returning  = 2x              =1 1/3 hrs/mile
time(roundtrip)= 2hours
solution
x + 2x = 2
3x = 2
x = 2/3