Multiple choice

A is 20 percent more efficient than B. If the two persons can complete a piece of work in 6 days working together, in how many days can A complete the work working alone?

  1. 11

  2. 22

  3. 13

  4. 13.2

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If B's efficiency is x, A's is 1.2x. Together they do 2.2x work per day. In 6 days, total work is 13.2x. A alone takes 13.2x / 1.2x = 11 days.