Dorthy756
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Jonathan drove to the airport to pick up his friend. A rainstorm
forced him to drive at an average speed of 45 mph, reaching the
airport in 3 hours. He drove back home at an average speed of
55 mph. How long, to the nearest tenth of an hour, did the trip home
take him?
(1) 2.0 hours (3) 2.8 hours
(2) 2.5 hours (4) 3.7 hours



Answer :

mumsy
on the way to the airport he drove with 45 mph in 3 h
the distance is 45mph*3h=135 miles
on the way back, he drove with 55 mph
55mph/?h=135 miles
h=135/55= 2.5
choice 1

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