SOLUTION: The speeds (in revolutions per minute) of two pulleys are inversely proportional to the pulleys' diameters. One pulley's diameter is 12 and that pulleys speed is 160 rpm. If the ot

Algebra ->  Rate-of-work-word-problems -> SOLUTION: The speeds (in revolutions per minute) of two pulleys are inversely proportional to the pulleys' diameters. One pulley's diameter is 12 and that pulleys speed is 160 rpm. If the ot      Log On


   



Question 378377: The speeds (in revolutions per minute) of two pulleys are inversely proportional to the pulleys' diameters. One pulley's diameter is 12 and that pulleys speed is 160 rpm. If the other pulley's diameter is 4, what is speed 2?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
12*160 = 1920
1920/4 = 480 rpm