1.

1). 62). 123). 94). 15

Answer»

Let A can FINISH the task in ‘x’ days and B can finish the task in ‘y’ days

? C can finish the task in 36 days

When they work together, part of work finished by all three in one day = 1/x + 1/y + 1/36

It is given that, A, B and C together can finish a task in 9 days

9(1/x + 1/y + 1/36) = 1

1/x + 1/y = 1/12

We can SAY that A and B can do 100% of the job working together in 12 days

A and B can do 50% of the job working together in 6 days



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