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If 15 men can reap a field in 35 days, in how many days will 21 men reap the field?

If 15 men can reap a field in 35 days, in how many days will 21 men reap the field? Correct Answer 25 days

15 men can reap the field in 35 days 1 man can reap the field in 35 x 15 days So, 21 men can reap the field in 35 x 15 / 21 =  25 days

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