Question : A, B, and C can complete a piece of work separately in 10, 20, and 40 days, respectively. In how many days will the work be completed if A is assisted by both B and C on every third day?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution :
A's 1 day's work =
B's 1 day's work =
C's 1 day's work =
(A + B + C)'s 1 day's work =
Work done in three days will be the sum of A's two days' work and (A + B + C)'s 1 day's work.
A's two days work =
Therefore, the work is done in three days =
6 days work =
7th and 8th day work = two days work of A =
Thus remaining work =
So, the entire job will be done by them in =
Hence, the correct answer is
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