A, b and c can finish a work in 20, 24 and 30 days respectively. They start working together. If b stops after 4 days, how long would it take a and c to finish the remaining?
Answers
If A can do this work in 12 days, he/she can do 112 of it in one day.
If B can do this work in 15 days, he/she can do 115 of it in one day.
If C can do this work in 20 days, hIf they can do these fractions of this work on one day, adding these numbers up, we can see how much of this work is done in one day by the three people working at the same time:
112+115+120=560+460+360=1260=15. So the three people can do 15 of this work on one day. C left after two days, so before he left, 25 of this work were done. A does 112 of it every day, and B does 115 of it every day, so together, they do 112+115=560+460=960=320 of it every day. Since 25 of this work were done when C left, when only A and B started working on the project, there were 35=1220of this work left. If 320 of it is done every day, it takes four days to complete the rest of this work. The remaining work will be completed by A and B in 4 days.e/she can do 120 of it in one day.