Can someone help.plsss Can someone help.plsss 12. A pulley revolves at a speed that is inversely proportional to its diameter. A pulley with a diameter of 12 cm is belted to a pulley with a diameter of 8 cm. If the smaller pulley is revolving at a rate of 105 rpm (revolutions per minute), how fast is the larger pulley revolving? Share with your friends Share 0 Neha Sethi answered this Here speed will be considered as angular velocity as they are talking about angle(105 rpm)Given: vangular velocityα 1diameter d⇒v=kd⇒vd=k , where k is a constant⇒v1d1=k =v2d2⇒105×8=v2×12⇒v2=105×812⇒v2=70 So, larger pulley is revolving at the rate of 70 rpm.Note:v1=angular velocity of smaller pulley.d1=diameter of smaller pulley.v2=angular velocity of larger pulley.d2=diameter of larger pulley. 0 View Full Answer