Question

A competes 40 per cent of the work-in 9 days and then calls B
and completes the remaining work in 6 days. How long will it
take for B to complete the whole work alone?

Answer 1

Answer:

does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work? = 25 days.