A cable railway had a 12-foot-diameter pulley to drive the cable (see the figure). In order to keep the cable cars moving at a linear velocity of 9 miles per hour, how fast would the pulley need to turn (in revolutions per minute)? (1 mi = 5,280 ft)
A)23.2 rpm
B)24.5 rpm
C)15.3 rpm
D)28.1 rpm
E)21.0 rpm

Question

A cable railway had a 12-foot-diameter pulley to drive the cable (see the figure). In order to keep the cable cars moving at a linear velocity of 9 miles per hour, how fast would the pulley need to turn (in revolutions per minute)? (1 mi = 5,280 ft)​  ​
A)23.2 rpm 
B)24.5 rpm 
C)15.3 rpm 
D)28.1 rpm 
E)21.0 rpm

Quizplus · Accepted Answer

The Answer of A cable railway had a 12-foot-diameter pulley to drive the cable (see the figure). In order to keep the cable cars moving at a linear velocity of 9 miles per hour, how fast would the pulley need to turn (in revolutions per minute)? (1 mi = 5,280 ft)​  ​
A)23.2 rpm 
B)24.5 rpm 
C)15.3 rpm 
D)28.1 rpm 
E)21.0 rpm

A Cable Railway Had a 12-Foot-Diameter Pulley to Drive the Cable