Question

A man, a woman, a boy, and a girl can complete a certain

Q: Answer-A man, a woman, a boy, and a girl can complete a certain task individually in 84 days, 105 days, 140...

Let the total work L.C.M of 84, 105, 140, and 210 420 unitsEfficiency of a man 420 84 5 unitsdayEfficiency of a woman 420 105 4 unitsdayEfficiency of a boy 420 140 3 unitsdayEfficiency of a girl 420 210 2 unitsdaySo, time taken by a man, a woman, a boy and a girl working together 420 5 4 3 2 30 days

task individually in 84 days, 105 days, 140 days, and 210 days respectively. How long will it take for all four of them working together to complete the task?

A 21 days

B 30 days

C 28 days

D 36 days

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SSC CGL

A man, a woman, a boy, and a girl can complete a certain

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