a) 30 days
b) 36 days
c) 20 days
d) 40 days
Answer: c
Explanation (3 men + 7 women) × 5 days = (4 men + 6 women) × 4 days
1 men = 11 women
∴ 3 men + 7 women
(3 × 11) women + 7 women
= 40 women
40 women can do a work in 5 days
1 women can do a work in (5 × 40) days
10 women can do a work in = $$\frac{{5 \times 40}}{{10}}$$ = 20 days
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