Question

A car is driving at a speed of 40 mi/h. What is the speed of the car in feet per minute? a. 2,400 ft/min b. 211,200 ft/min c. 3,520 ft/min d. 1,720 ft/min

Answer 1

3520 ft/min

Explanation:

40 mi/h = (40 mi/h)×(5280 ft/mi)×(1 h)/(60 min) = 3520 ft/min

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Each conversion factor has a value of 1 (numerator = denominator), so changes the units without changing the speed.