Two interconnected, circular gears travel at the same circumferential rate. If Gear A has a diameter of 40 centimeters and Gear B has a diameter of 50 centimeters, what is the ratio of the number of revolutions that Gear A makes per minute to the number of revolutions that Gear B makes per minute?	Choose the correct choice:
A) 4:5 B) 9:25 C) 5:4 D) 25:9 E) Cannot be determined from the information provided
Same circumferential rate means that a point on both the gears would take same time to come back to the same position again.   Hence in other words, time taken by the point to cover the circumference of gear A = time take by point to cover the circumference of gear B   Time A = 2*pi*25/Speed A   Time B = 2*pi*20/Speed B   Since the times are same,   50pi/Speed A = 40pi/Speed B   SpeedA/Speed B = 50pi/30pi = 5/4   5:4orrect Option: 5:4
<result>C</result>
Two interconnected, circular gears travel at the same circumferential rate. If Gear A has a diameter of 40 centimeters and Gear B has a diameter of 50 centimeters, what is the ratio of the number of revolutions that Gear A makes per minute to the number of revolutions that Gear B makes per minute?