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A trundle wheel can be used to measure distance along the ground. The distance traveled in one revolution of the wheel is equal to the circumference of the wheel.
Given that the circumference of a trundle wheel is 3 feet, find
a) its diameter to the nearest 0.1 inch.
b) the distance that the wheel travels in making five revolutions.
a) circumference, c = pi * d. c = 3 feet or 3 * 12 = 36 inches. We get,
36 = pi * d
d = 36 / pi = 11.5 inches
b) 5 revolutions = 5 * circumference = 5 * 3 = 15 feet or 180 inches.