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Q. A, Band C can do a piece of work in 11 days, 20 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by Band C on alternate days?

Option
a) 7 days
b) 8 days
c) 9 days
d) 10 days

Read Solution (Total 3)

Ans: 8 days
(A+B)'s 1 day's work = 1/11+1/20 = 31/220
(A+C)'s 1 day's work = 1/11+1/55 = 6/55
work done in 2 day's = 31/220+6/55 = 55/220 = 1/4
1/4th work done in 2 days
work done= 4*2 = 8 days
11 years agoHelpfull: Yes(17) No(0)

b)is the right answer.
11 years agoHelpfull: Yes(0) No(5)
b) 8 days
1 day work of a n b = (1/11)+(1/20)=31/220
1 day work of a n c =(1/11)+(1/55)=(6/55)
then total work completed in two days =(31/220)+(6/55)=(1/4)
there fore total work will complete in 8 days
10 years agoHelpfull: Yes(0) No(0)

CMC Other Question

Q. Ram can do a piece of work in 8 days which Shyam can finish in 12 days. If they work at it on alternate days with Ram beginning, in how many days, the work will be finished?

Option
a) 9 1/3
b) 9 1/2
c) 91/24
d) 10 1/3 Q. A certain number of men complete a piece of work in 60 days. If there were 8 men more, the work could be finished in 10 days less. How many men were originally there?

Option
a) 30
b) 32
c) 36
d) 40