Question

A and B can do a piece of work in 72 days B and C can do it in 20 days a and c can do it in 90 days in what time can a b and c together finish the work​

Answer 1

Answer:

they can finish in 13.333.......

as the one day work of a and b 1/72

Answer 2

Answer:

528 hr (hour)

Step-by-step explanation:

by mutiplying 20 days with 24 hr because there are 24hr in a day