4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?  Answers
A) 11	B) 40	C) 88	D) 76	E) 26
Let 1 man's 1 day work = x and 1 woman's 1 day work = y.   Then, 4x + 6y = 1/8 and 3x + 7y = 1/10   Solving these two equations, we get:   x = 11/400 and y = 1/400   1 woman's 1 day work = (1/400 * 10) = 1/40.   Hence, 10 women will complete the work in 40 days.   Answer:40
<result>B</result>
4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?