Book Maths Puzzle Numerical Ability Time and Work

A takes twice as much time as B or thrice as much time to finish a piece of work.working together,they can finish the work in 2 days.B can do the work alone in????

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Book Other Question

Area of a square is 2000100sqcm find its perimeter 16 men can complete a work in 15 days . 24 children can do same work in 20 days . in how many days will eight men and 8 children together complete the work ?