Multiple choice

P is twice as efficient as Q and together they finish a piece of work in 12 days. How many days will P take to complete the work alone?

  1. 18 days

  2. 24 days

  3. 36 days

  4. 32 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If P is twice as efficient as Q, P does 2 units of work while Q does 1 unit. Together they do 3 units per day. In 12 days, total work is 3 * 12 = 36 units. P takes 36 / 2 = 18 days to finish alone.

AI explanation

Let Q's efficiency be 1 unit per day, making P's efficiency 2 units per day, so their combined daily work is 3 units. Working together for 12 days, the total work is 12 days times 3 units per day, totaling 36 units. Therefore, P alone would take 36 units divided by 2 units per day, which equals 18 days.

Keep practicing — related questions