# Revolutions Per Minutes

#### magentarita

A pulley that has a diameter of 8 inches is belted to a pulley that has a diameter of 12 inches. The 8-inch-diameter pulley is running at 1,548 revolutions per minute. If the speeds of the pulleys vary inverselyto their diameters, how many revolutions per minute does the larger pulley make?

MHF Hall of Honor
..try this

A pulley that has a diameter of 8 inches is belted to a pulley that has a diameter of 12 inches. The 8-inch-diameter pulley is running at 1,548 revolutions per minute. If the speeds of the pulleys vary inverselyto their diameters, how many revolutions per minute does the larger pulley make?
---according to question-----
speed=k/diameter......(k=arbitary constant)
now applying for first and second pulley
u get
8=k/1548......(1)
12=k/?..........(2)
get k from ( 1) put it in (2) u get the ans

magentarita

#### magentarita

great....

A pulley that has a diameter of 8 inches is belted to a pulley that has a diameter of 12 inches. The 8-inch-diameter pulley is running at 1,548 revolutions per minute. If the speeds of the pulleys vary inverselyto their diameters, how many revolutions per minute does the larger pulley make?
---according to question-----
speed=k/diameter......(k=arbitary constant)
now applying for first and second pulley
u get
8=k/1548......(1)
12=k/?..........(2)
get k from ( 1) put it in (2) u get the ans
I can take it from here.