Mathematics
NULL
Medium
Question
3 men and 7 women finish a work in 10 days; 4 men and 6 women need 8 days. How many days will 10 women take?
A
50
B
30
C
40
✓ Official correct answer
D
13
Community credibility
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A
50
No member explanations yet for this option.
B
30
No member explanations yet for this option.
C
40
No member explanations yet for this option.
D
13
No member explanations yet for this option.
Explanation
(3m+7w)×10 = (4m+6w)×8 ⇒ m = 11w. Total work = 40w×10 woman-days. Then 10 women need 40 days.