A, B and C can finish a work in 10, 12 and 15 days respectively. How many days will they take working together?
A. 6 days
B. 5 days
C. 4 days
D. 3 days
A. 6 days
B. 5 days
C. 4 days
D. 3 days
Best answer
Answer: C. 4 days
Answer: (C) 4 days
LCM method: work = 60 units. A = 6, B = 5, C = 4 units/day; together 15 units/day.
Days = 60 ÷ 15 = 4.
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