A can do a piece of work in 10 days and B in 15 days. How long will they take together to finish it ?
7 days
3 days
9 days
6 days
A
9 days
B
7 days
C
3 days
D
6 days
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Solution
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Work done by A in 1 day =110
Work done by B in 1 day=115
Work done by A and B in 1 day=110+115=25150
Working together they will complete the work in 15025=6 days
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