A wheel has a diameter of x inches and a second wheel has a diameter of y inches. The first wheel covers a distance of d feet in 400 revolutions. How many revolutions does the second wheel make in covering d feet?
Choose the most appropriate option:
A) 400xy
B) 400y - x
C) 400x - y
D) 400x/y
E) 400y/x
First Wheel with diameter x inches ----&gt; So the circumference = x*pi --------- (1)   Second Wheel with diameter y inches ----&gt; So the circumference = y*pi --------- (2)   Revolutions = distance/circumference   So, from equation (1)   400 = d/(x*pi)   d = 100 * x * pi ---------- (3)   From equation (2)   Revolutions = d/(y*pi) = (400 * x * pi) / (y*pi) = 400x/y   Answer (400x/y)
<result>D</result>
A wheel has a diameter of x inches and a second wheel has a diameter of y inches. The first wheel covers a distance of d feet in 400 revolutions. How many revolutions does the second wheel make in covering d feet?