Q13 of 28 Page 11

A can do a piece of work in 40 days and B in 45 days. They work together for 10 days and then B goes away. In how many days will A finish the remaining work?

Given,


A can do a piece of work in 40 days


B can do it in = 45 days


A’s 1 day work =


B’s 1 day work =


(A+B)’s 1 day work together =


A+B’s 10 day work =


Remaining work =


∴ Remaining work will be done by A = days.


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A and B can do a piece of work in 20 days and B in 15 days. They work together for 2 days and then A goes away. In how many days will B finish the remaining work?

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A and B can do a piece of work in 6 days and 4 days respectively. A started the work, worked at it for 2 days and then was joined by B. Find the total time taken to complete the work.