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A can do 1\2 of a piece of work in 5 days, B can do 3\5 of the same work in 9 days and C can do 2\3 of that work in 8 days. In how many days can three of them together do the work ?
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Explanation:
A can do 1\2 of a piece of work in 5 days
A can do 1 unit of the work in
5×2 \1 = 10 days
Similarly B complete 1 unit of
=9×5,\3 = 15days
C complete 1 unit of work in
=8× 3\2=12 days
=A+B+C one day work
=15 units
They will complete the whole work in
60\15=4 days