Two mechanics were working on your car. One can complete the given job in 5 hours, but the new guy takes eight hours. They worked together for the first two hours, but then the first guy left to help another mechanic on a different job. How long will it take the new guy to finish your car? Choose the correct choice from the following
A) 7/4
B) 4/3
C) 14/5
D) 10/3
E) 17/5
Rate(1)=1/5   Rate(2)=1/8   14/5ombined = 13/40   Work done in 2 days=13/20   Work left = 7/20   Rate * Time = Work left   1/8 * Time = 7/20   Time=14/5   14/5
<result>C</result>
Two mechanics were working on your car. One can complete the given job in 5 hours, but the new guy takes eight hours. They worked together for the first two hours, but then the first guy left to help another mechanic on a different job. How long will it take the new guy to finish your car?