Question : X can do a piece of work in 14 days, Y can do the same work in 28 days and Z can do it in 42 days. In how many days can X, Y, and Z together complete the work?
Option 1:
Option 2:
Option 3:
Option 4:
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Correct Answer:
Solution :
The time taken by X, Y, and Z to complete work alone is 14, 28 and 42 days, respectively.
So, 1 day's work of X, Y, and Z, respectively is
Their total 1 day's work
=
=
=
So, total time is taken if X, Y, and Z working together =
Hence, the correct answer is
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