Find the time it takes for 10 men and 15 women to plow a field if 5 men and 7 women can do it in 10 days and 20 men and 42 women can do it in 2.

1
\(\frac{100}{23}\)
2
\(\frac{140}{29}\)
3
\(\frac{111}{22}\)
4
\(\frac{140}{35}\)

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