Perimeter of front wheel =30, back wheel = 20. If front wheel revolves 240 times. How many revolutions will the back wheel take?  Select the correct option:  A) 120  B) 180  C) 240  D) 360  E) 480
sice the distance covered by both the wheels should be same   so   let x be the no. of revolutions by the back wheel   so 240*2*pie*30=x*2*pie*20   so x=360.   ANSWER:360
<result>D</result>
Perimeter of front wheel =30, back wheel = 20. If front wheel revolves 240 times. How many revolutions will the back wheel take?