3 men and 7 women can complete a work in 10 days . But 4 men and 6 women need 8 days to complete the same work . In how many days will 10 women complete the same work?	Choose one:
A) 50 B) 40 C) 30 D) 20 E) 10
Explanation :   Work done by 4 men and 6 women in 1 day = 1/8   Work done by 3 men and 7 women in 1 day = 1/10   Let 1 man does m work in 1 day and 1 woman does w work in 1 day. The above equations can be written as   4m + 6w = 1/8	---(1)   3m + 7w = 1/10	---(2)   Solving equation (1) and (2) , we get m=11/400 and w=1/400   Amount of work 10 women can do in a day = 10 × (1/400) = 1/40   Ie, 10 women can complete the work in 40 days   Answer : Option 40
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3 men and 7 women can complete a work in 10 days . But 4 men and 6 women need 8 days to complete the same work . In how many days will 10 women complete the same work?