A and B were supposed to finish a piece of work together in 30 days. They worked together for 20 days and then B left. A finished the remaining work after another 20 days.
How many days would A take to finish the job alone?

A

and

B

together can finish a work in

30

days. They worked on it for

20

days and then

B

left the work. The remaining work was done by

A

alone in

20

days more. In how many days can

A

alone finish the work?

Q. A, B and C together can do a piece of work in

15

days, B alone can do it in

30

days and C alone can do it in

40

days. In how many days will A alone do the work?

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A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days will B finish the whole work alone?

The correct option is C 60 days Let A's 1 day's work = x and B's 1 day's work = y Then x + y = 130 and 16x + 44y = 1 Solving these two equations, we get : x = 160 and y = 160 ∴ B's 1 day's work = 160 Hence B alone will finish the whole work in 60 days.