A circular rim A having a diameter of 36 inches is rotating at the rate of x inches/min. Another circular rim B with a diameter of 84 inches is rotating at the rate of y inches/min. What is the value of y in terms of x, if both the rims reach their starting positions at the same time after every rotation.  Choose the correct answer
A) 3x/7
B) 4x/5
C) 7x/5
D) 5x/7
E) 3x/4
t = S1/V1 = S2/V2   or, 36/x = 84/y   or, y = 36x/84 = 3x/7 (3x/7nswer 3x/7)
<result>A</result>
A circular rim A having a diameter of 36 inches is rotating at the rate of x inches/min. Another circular rim B with a diameter of 84 inches is rotating at the rate of y inches/min. What is the value of y in terms of x, if both the rims reach their starting positions at the same time after every rotation.