A machine shaft is running 250 rpm and machine spindle is to be driven directly from the main shaft running at 125 rpm. If the diameter of pulley fitted on the machine spindle is 20 cm, what would be the diameter of pulley fitted on the main spindle?

A machine shaft is running 250 rpm and machine spindle is to be driven

1.	A machine shaft is running 250 rpm and machine spindle is to be driven directly from the main shaft running at 125 rpm. If the diameter of pulley fitted on the machine spindle is 20 cm, what would be the diameter of pulley fitted on the main spindle?
A.	10 cm
B.	20 cm
C.	50 cm
D.	100 cm
Answer» B. 20 cm