Practice!

Sample Problem

A plane took 3 h 33 min to finish a journey. If the distance of the journey was 2840 miles, at what average speed did the plane travel?

  mph

Solution

Recall the formula: Distance ÷ time = speed

3 h 33 min = 3 h + 33/60 = 3 h + 0.55 h = 3.55 h

Thus, speed: 2840 ÷ 3.55 = 800 mph