Question

Three brothers own a painting company called Tiga Abdul Enterprise. They are hired to paint a building.
Wahab says. "I can paint this building in 3 months if I work alone". Wahib says, "I can paint this building in 2 months if !
work alone". Wahub says, "I can paint this building in k months if I work alone". If they work together, they can finish
painting the building in 1 month only.
What is k?​

Answer 1

Answer:

6 months

Step-by-step explanation:

work done by wahab in 1 month =1/3

work done by wahib in 1 month =1/2

work done by wahub in 1 month =1/k

therefore :

work done by all together in 1 month =1/1

1/1=1/3+1/2+1/k

2+3/6+1/k=1

5/6+1/k=1

1/k=1-5/6

1/k=6-5/6

1/k=1/6

k = 6

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