Anand started a work on Sunday at 9:30 am. He finished the work after 87 hours. Then the finished the work on______.

A started a work and left after working for 2 days. Then B was called and he finished the work in 9 days. Had A left the work after working for 3 days, B would have finished the remaining work in 6 days. In how many days can each of them, working , alone, finish the whole work? a. 2.5 days , 7. 5 d a y s b. 5 d a y s , 8. 5 d a y s c. 5 d a y s , 15 d a y s d. none of these

A started a work and left after working for 4 days, then B was called and he finished the work in 18 days. If A left the work after working for 6 days then B would have finished the remaining work in 12 days. In how many days can each of them, working alone finish the whole work?