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An emergency vehicle travels 10 miles at a speed of 50 miles per hour. How fast must the vehicle travel on the return trip if the round trip travel time is 20 minutes?

An emergency vehicle travels 10 miles at a speed of 50 miles per hour. How fast must the vehicle travel on the return trip if the round trip travel time is 20 minutes? Correct Answer 55 mph

50 miles travel in 60 minutes 10 miles travel in ( 60×10)/50 = 12 min Now, 20 - 12 = 8 min In 8 minutes it has to go 10 miles In 1 minutes it has to go 10/8 miles In 60 minutes it has to go ( 10×60)/8 = 75 mph

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