Question

A, B, and C can together do some work in 72 days. A and B can together do two times as much work as Calone and
A and C together can do four times as much work as B alone. Find the time taken by C alone to do the whole work​

Answer 1

the work done by A, B and C together

A + B + C =>72 days ------(1)

A + B =2C ---------(2)

A + C = 4B -----------(3)

subtitute (2) in (1) we get

2C + C => 72 means that three C can do that work in 72 days

so one C take 72 x 3 days ie. 216 days