How many revolutions will a car wheel of diameter 18 in. make as the car travels a distance of one mile? (round your answer to the nearest whole number.) incorrect: your answer is incorrect. revolutions

The circumference of a circle is (pi) x (the diameter).

If the diameter of the wheel is 18 inches (1.5 feet), then its circumference is

(pi) x (1.5 feet) =  1.5π feet .

Every time the wheel rotates once, the car moves 1.5π feet.

1 mile = 5,280 feet

In order for the car to move 5,280 feet, the wheel has to rotate

(5,280 / 1.5π) times.

(5,280 / 1.5π) = 1,120.4508 times

Rounded to the nearest whole number:  1,120 revolutions

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