X can do a job in 10 days, Y in 15 days. They work together for 4 days. What part of work remains?
Correct Answer :
Solution :
The correct option is .
To find the part of work that remains, let us calculate the work done by X and Y individually and together.
Work done by X in 1 day =
Work done by Y in 1 day =
Work done by X and Y together in 1 day =
Taking the LCM of 10 and 15, which is 30:
Work done in 1 day =
They work together for 4 days. Therefore, work completed in 4 days =
The remaining part of the work =
Thus, the remaining part of the work is .
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