Solve the problem.
-Two pulleys, one with a radius of 13 inches and the other with a radius of 8 inches, are connected by a belt. If the larger pulley makes 7 revolutions per minute, how many revolutions per minute does the smaller pulley make? Round your answer to the nearest tenth.
A) $14.9 \mathrm { rpm }$
B) $1.6 \mathrm { rpm }$
C) $0.2 \mathrm { rpm }$
D) $11.4 \mathrm { rpm }$

Question

Quizplus · Accepted Answer

The revolutions per minute of the smaller pulley can be found using the ratio of the radii. Since the larger pulley has a radius of 13 inches and makes 7 revolutions per minute, the smaller pulley with a radius of 8 inches will make $(13/8) \times 7 = 11.375$ revolutions per minute, which rounds to 11.4 rpm.

Solve the Problem 14.9rpm14.9 \mathrm { rpm }14.9rpm B) 1.6rpm1.6 \mathrm { rpm }1.6rpm

Solve the Problem $14.9 \mathrm { rpm }$ B) $1.6 \mathrm { rpm }$