Financial Math

In one turn of pulley A, a length of belt equal to its circumference will move. In order for the same length of belt to cause motion in pulley B, pulley B must make 2 turns (assume no slippage). Therefore,pulley B will move twice as fast. If pulley A is 40 inches in diameter and pulley B is 8 inches in diameter, what is the ratio of the size A ... ................
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