The S A T® - SAT Suite of Assessments

Choice C is correct. Since Gear A has 20 teeth and Gear B has 60 teeth, the gear ratio for Gears A and B is 20 to 60. Thus the ratio of the number of revolutions per minute for the two gears is 60 to 20, or 3 to 1. That is, when Gear A turns at 3 revolutions per minute, Gear B turns at 1 revolution per minute. ................
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