A, B and C can do a work in 6 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work? Select one: a. 2 1/3 days b. 1 2/3 days c. 2 2/3 days d. 4 2/3 days
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Answer:
A one day work = 1/6
.
B one day work = 1/8
.
C one day work = 1/12
.
A,B,C one day work = 1/6 + 1/8 + 1/12
= 4+3+2/24
= 9/24
.
Therefore their total days work = 24/9 = 8/3 = 2 2/3 days
.
Ans is option no. c
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