Question

The front wheel of a child's tricycle has a 10-inch radius and the rear wheels have a 6-inch radius. The pedals are attached to the front wheels by arms that are 7 inches long. How far does a pedal travel when the rear wheels make one revolution?
the front wheel makes 6/10 of a turn for every turn of the rear wheel.

So, the pedals move (6/10)*2pi*7 inches during that time.

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