RRB Group D 22-Sep-2018 Shift 1 Solved Paper

Question : 91 of 100

Marks: +1, -0

A and

B

can complete a piece of work together in 20 days. They start work together but A had to leave 5 days before the work finally got over. If

\ {B}

finishes the remaining in 18 days, then how long will B take to complete the work separately.

Solution:

A's one day work

={1}/{A}

B's one day work

={1}/{B}

15( {1}/{{A}}+{1}/{{B}})+{1}/{{B}} \×18=1

{1}/{20} \×15+{18}/{{ B}}=1

{B}=72

(B will finish the work in 72 days)

Go to Question:

Prev Question

Next Question