+30 A horse 64 feet from the center of a merry-go-round makes 27 revolutions. In order to travel the same distance, how many revolutions would a horse 16 feet from the center have to make?
A horse 64 feet from the center of a merry-go-round makes 27 revolutions. In order to travel the same distance, how many revolutions would a horse 16 feet from the center have to make?
The circumference of a circle radius 64 is 2 • π • 64 = 128 π
The circumference of a circle radius 16 is 2 • π • 16 = 32 π
128 π / 32 π = 4
So the horse travelling the smaller circle has to go 4 times around to go
the same distance as the horse travelling the larger circle 1 time around.
When the horse travels the distance of 27 times around the outer circle,
the other horse has to go around 4 times as much for the same distance.
4 • 27 = 108 revolutions
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