Question

The diameter of a child's bicycle wheel is 14 inches. Approximately how many revolutions of the wheel will it take to travel 2,400 meters? Use 3.14 for π and round to the nearest whole number. (1 meter ≈ 39.3701 inches)

4,298 revolutions
2,149 revolutions
1,340 revolutions
171 revolutions

Answer 1

The answer would be 2,149

Answer 2

2,149 revolutions

Explanation:

First we need to find circumference of the circle (the bicycle)

C = 2πr (radius is half the diameter)

C = 2 x 3.14 x 7

C = 43.96in.

Then convert meters to inches

2,400 meters = 94,488 inches

Lastly, divide the inches by the circumference of the circle

94,488 ÷ 43.96in.

= 2,149.40

So it is an estimate of 2,149 revolutions