A and B can do a work in 12 days, B and C in 15 days and C and A in 20 days. If A, B and C work together, they will complete the work in :
A and B can do a work in 12 days, B and C in 15 days and C and A in 20 days. If A, B and C work together, they will complete the work in :
[A]
[B]5 days
[C]10 days
[D]
10 days
According to question,
A and B can do a work in 12 days
∴ (A + B)’s one day’s work
Similarly, (B + C)’s one day’s work
and (C + A)’s one day’s work
On adding all three,
∴ 2 (A + B + C)’s one day’s work
and (A + B + C)’s one day’s work
∴ A, B and C together can complete the work in 10 days.
Harpreet
March 31, 2018 at 3:32 pmOh.. Quite simple… I got it