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 80 revolutions. How many revolutions does the second wheel make in covering d feet?
Choose the correct option.
A) 80y/x  B) 80x/y  C) 80-x  D) 80-y  E) 80x-y
A wheel covers 2πr distance in one revolution. where r= diameter/2   First wheel covers d feet in 80 rev. =&gt; d= 80* 2π * (x/2)   Second wheel covers d feet in let's say P revolutions; =&gt; d = P* 2π * (y/2)   comparing both equations:-   =&gt; p= (80∗2π∗x/2)/(2π∗y/2)   =&gt; 80x/y   Answer :- 80x/y
<result>B</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 80 revolutions. How many revolutions does the second wheel make in covering d feet?