issb mathematics MCQ #301

A twice B. Together 12 days. A alone:

issb mathematics MCQ #301

  1. Question 1

    Q1. A twice B. Together 12 days. A alone:

    • A) 16
    • B) 18
    • C) 20
    • D) 24

    Answer: 18

    Explanation: If A is twice B, rates 2k and k. Together 3k=1/12, k=1/36. A is 2k so A takes 18 days.