A, B and C can complete a piece of work in 5, 20 and 60 days respectively, Working together, the same work will be done in how many days?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e.
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Understanding |
Application |
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Total work = LCM of 5, 20 and 60 = 60 units Hence, Efficiency of A = 60/5 = 12 units Efficiency of B = 60/20 = 3 units Efficiency of C = 60/60 = 1 unit |
Total efficiency = 12 + 3 + 1 = 16 Hence, Time in which they will complete the work together = 60/16 = 15/4 = |