Question

A and B working together can complete a piece of work in 20 days.If A alone can complete this work in 30 days how much time will B take to finish it?​

Answer 1

Answer:

60 days

Step-by-step explanation:

Let A alone take x days

Then C alone will take 2x days

So B in 1 day does 1/20 - 1/x

So B in 1 day does 1/30 -1/2x

1/20 -1/x = 1/30 -1/2x

MULTIPLY BY 60x

3x - 60 = 2x - 30

x= 30

2x= 60 days ANSWER