If 12 men or 18 women can reap a field in 7 days, then in what time can 4 men and 8 women reap the same field?
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in 9 days.
since 18 women=7days=1unit of work
so 1 woman=1day=1/126units
and similarly 1 man=1day=1/84 units
4 men 1 day work will be 4/84=1/21
8 women 1 day work will be 8/126=4/63
one day work of 4 men and 8 women=
1/21+4/63=7/63=9days
since 18 women=7days=1unit of work
so 1 woman=1day=1/126units
and similarly 1 man=1day=1/84 units
4 men 1 day work will be 4/84=1/21
8 women 1 day work will be 8/126=4/63
one day work of 4 men and 8 women=
1/21+4/63=7/63=9days
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