Question

A and B together can complete a piece of work in 72 days, B and C together can complete it in 120 days, and A and C together in 90 days. In what time can A alone complete the work?
A. 150 days
B. 80 days
C. 100 days
D. 120 dyas

Answer 1

Answer: 120 days

Step-by-step explanation:

2 (1/A+1/B+1/C)

2 (1/72+1/120+1/90)

= 1/15 days

So, A+B+C can do the work in 15 days

Hence, 1/A+1/B+1/C = 1/15

1/A+1/120 = 1/15

A = 120 days

Answer 2

ANS..120 days

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