Question

If 5 men working 6 hours a day can reap a field in 20 days, in how many days will 15 men reap the field if they work for 8 hours a day?

Answer 1

it takes 600 man-hr to reap the field

600 / (8 * 15)

Answer 2

5 men 6 hours 20 days
15 men 8 hours ?
120/8 =20
20*6=120