Question

A can do a piece of work in 40 days b can do the same piece of work in 60 days. A and b started the work together in the rst 15 days a worked with 50% of his eciency, in the next 15days b worked with 50% of his eciency. Now in how many days does the remaining work will be completed if both of them work with their full eciencies?

Answer 1

the remaining work will be completed in 9/2 i.e. 4.5 days