Discussion :: Time and Work
-
A and B together can complete a task in 7 days. B alone can do it in 20 days. What part of the work was carried out by A?
I.
A completed the job alone after A and B worked together for 5 days.
II.
Part of the work done by A could have been done by B and C together in 6 days.
A.
I alone sufficient while II alone not sufficient to answer |
B.
II alone sufficient while I alone not sufficient to answer |
C.
Either I or II alone sufficient to answer |
D.
Both I and II are not sufficient to answer |
E.
Both I and II are necessary to answer |
Answer : Option A
Explanation :
B's 1 day's work =120
(A+ B)'s 1 day's work =17
I. (A + B)'s 5 day's work =57
Remaining work =[1-57]=27
27work was carried by A
II. is irrelevant
riyadriayd7070@gmail com