A circular rim 28 inches in a diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes D revilutions per second, how many revilutions per minute does the larger rim makes in terms of D?
Choose the correct choice from the following answers.
A) a) 48pi/D B) b) 75m C) c) 48D D) d) 24D E) e) D/75
distance covered by a circular wheel per sec* = 2*pi* r * n   where n is number of revolution   So we know the smaller rim makes D rev per sec so the inches coverd SR per sec = 28 * pi* D   the problem the say SR rotates the same number of inches as the LR.   The inches covered by the LR per sec = 35 * pi*Y   So equate both u will get Y = 4/5 D   Theis is in sec we need the answer in min so 48 D   answer is c) 48D
<result>C</result>
A circular rim 28 inches in a diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes D revilutions per second, how many revilutions per minute does the larger rim makes in terms of D?