4 men and 3 women finish a job in 6 days, and 5
men and 7 women can do the same job in 4 days.
How long will 1 man and 1 woman take to do the
work?
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Answer:
(4 men +3 women)×6 days=(5 men +7 women)×4 days
24 men +18 women=20 men +28 women
4 men days =10 women days
1 men days =2.5 women days
Total work =24 men days +18 women days
=20 men days +28 women days
=78 women days
1 man +1 women =2.5 women +1 women =3.5
women can do
78/3.5
=22( 2/7) days
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