The front wheels of a wagon are 2Π feet in circumference and the rear wheels are 3Π feet in circumference. When the front wheels have made 10 more revolutions than the rear wheels, how many feet has the wagon travelled?
Select the correct option:	A) 30Π	B) 45Π	C) 60Π	D) 90Π	E) None
Solution   Let the rear wheel make x revolutions. Then, the front wheel makes (x+10) revolutions.   (x+10) x 3Π = x×2Π   ‹=›3x + 30 = 2x   ‹=›x = 30.   Distance travelled by the wagon = (2Π x 30)ft   ‹=›(60Π) ft.   Answer 60Π
<result>C</result>
The front wheels of a wagon are 2Π feet in circumference and the rear wheels are 3Π feet in circumference. When the front wheels have made 10 more revolutions than the rear wheels, how many feet has the wagon travelled?