PrepRung
Sign inSign up free

CAT 2017 Slot 2 · Quant · Time and Work · easy

In how many more days will B finish the remaining work?

Single correct option

A can complete a piece of work in 20 days and B can complete it in 30 days. They work together for 6 days, after which A leaves. In how many more days will B finish the remaining work?
  1. A. 12
  2. B. 14
  3. C. 15
  4. D. 18
Show answer and solution

Answer: (C) 15

Take total work = LCM(20, 30) = 60 units. A does 3 units/day and B does 2 units/day.

In 6 days together: 6 × 5 = 30 units.

Remaining 30 units, which B alone does in 30 ÷ 2 = 15 days.
Report a mistake

Original question written in the CAT 2017 Slot 2 pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake