p can do a piece of work in 20 days. q is 25 percent more efficient than p. in how many days half the work is completed when both are working simultaneously?
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Question: P can do a piece of work in 20 days. q is 25 percent more efficient than p. in how many days half the work is completed when both are working simultaneously?
Solution: P can do a piece of work in 20 days. i.e. 20 days - 1 work.
In 1 day - 1/20 part of the work.
Q is 25 percent more efficient than P. i.e. Q will take 20 - 25% of 20 days = 15 days.
In 1 day - 1/15 part of the work.
In 2 days the combined work = 1/20 + 1/15 part of the work.
or, 7/60 part of the work.
Therefore, to complete full work, no of days = 120/7 days
Therefore, to complete half the work, no of days = 60/7 days [Ans]
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Answer:
125:100=20/x
x=16
16 days is the right answer.
I hope it will help u
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