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Multiple Choice Questions

A and B undertake to do a piece of work for Rs 450 A can do it in 20 days and B can do it in 40 days...........

Quantitative Aptitude Time and work

A and B undertake to do a piece of work for Rs. 450. A can do it in 20 days and B can do it in 40 days. With the help of C, they finish it in 8 days. How much should C be paid for his contribution?

140

180

240

480

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Explanation:

A & B would have done 8/20 & 8/40 of the work respectively in 8 days.
Together they have done 3/5th of the work.
This implies that C has done 2/5th of the work.
Thus, C should be paid 2/5th of the amount
i.e. 450 × 2/5 = Rs. 180.

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