Warren runs at a rate of 1 lap every 7 mins

Rubin runs at a rate of 1 lap every 5 mins

In 7 mins , Rubin must have completed 2/5th of an additional lap by the time Warren completes Warren's first lap.

Time taken for Rubin to get exactly one lap ahead of Warren = 5/2 * 7 mins = 17.5 mins

Answer E

_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford

The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long

+1 Kudos if you find this post helpful