A, B, and C can complete a piece of work in 12, 15, and 20 days respectively. In how many days will they finish it together? MCQ with Answer and Explanation
A, B, and C can complete a piece of work in 12, 15, and 20 days respectively. In how many days will they finish it together?
A. 5 days
B. 6 days
C. 8 days
D. 4 days
Answer: Option A
Solution (By JKSSB Mock Tests)
Total work = LCM of 12, 15, and 20 = 60 units. Efficiency of A = 5, B = 4, C = 3. Total efficiency = 5 + 4 + 3 = 12 units/day. Days required = 60 / 12 = 5 days.
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