Time and Work Practice Test 2 with solutions

Question : 9 of 40

Marks: +1, -0

y is 45% more efficient than x. If y alone can do a work in 20 days, then how long will x alone take to do the same work?

29 days
30 days
18 days
17 days
None of these

Validate

Solution:

If y is 45% more efficient than x,
⇒ If y takes 100 days to do a work, then x takes 145 days to do the same work.
Now if y takes 20 days, then x will take

{145}/{100} × 20

= 29 days

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