A and B together can finish a work in 30 days. They worked for it for 20 days and then B left the work. The remaining work was done by A alone in 20 days more. In how many days can A alone finish the work?

A and B together can finish a work in 30 days. They worked for it for

1.	A and B together can finish a work in 30 days. They worked for it for 20 days and then B left the work. The remaining work was done by A alone in 20 days more. In how many days can A alone finish the work?
A.	48 days
B.	50 days
C.	54 days
D.	60 days
Answer» E.