A can do a piece of work in 28 days, while B can do the

Q: Answer-A can do a piece of work in 28 days, while B can do the same piece of work in 42 days. They begin wo...

Suppose the work finished in x days. A s one day work is 128 day Bs one day work is 142 day According to the question, Let the total work was done in x days then, A works for x - 6days Then, x - 628 x42 1 3x ndash 18 2x 84 5x 102 x 1025 days. Alternate Method A B 28 42 let total work LCM of 28 amp 42 84 units So Eff 3 2 So in last 6 days B worked alone so his work in last 6 days 2xx 6 12 units So remaining work 84-12 72 units Hence A amp B will do it in 725days Hence total days 725 6 1025 days

same piece of work in 42 days. They begin working together and 6 days before completion of work, A leaves. Find the total number of days taken to complete the work.

A 91/5 days.

B 102/5 days.

C 81/5 days.

D 64/5 days.

E None of these

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