A and B can do a piece of work in 12 days and 15 days respectively. They began to work together but A left after 4 days. In how many more days would B alone complete the remaining work?
A20/3
B25/3
C6
D5
Answer:
C. 6
Read Explanation:
A (4 days) = 4/12-1/3, Remaining=2/3, B=2/3 x 15=10 days;
B alone = 10 - 4 = 6 days