Question:
A68 days
B81 days
C96 days
D124 days
Answer:
9 children's 1 days work=1/360 => child's 1 days work =1/3240 18 men's 1 days work = 1/72 =>1 men's 1 days work =1/1296 12 women's 1 days work = 1/162 => 1 women's 1 days work = 1/1944 (4 men+12 women+10 children's) 1 days work=(4/1296 + 12/1944+ 10/3240) Hence they can finish the work in 81 days.
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