8 children and 12 men complete a certain piece of work in 9 days. If each child takes twice the time taken by a man to finish the work, in how many days will 12 men finish the same work ?
8
15
9
12
Explanation:
2 children = one man
8 children + 12 men = 4 men + 12 men
= 16 men
12 :16 = 9 : x (indirect)
12x=16×9=144
x = 12
2 children = one man
8 children + 12 men = 4 men + 12 men
= 16 men
12 :16 = 9 : x (indirect)
12x=16×9=144
x = 12