Multiple choice

$10$ pipes fill a tank in $3$ hours. How many pipes are required to fill it in $2$ hours?

  1. $15$
  2. $25$
  3. $30$
  4. $18$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is an inverse proportion problem. 10 pipes * 3 hours = x pipes * 2 hours. 30 = 2x, so x = 15.

AI explanation

Using the fixed work formula, the number of pipes required is 10 multiplied by 3 hours divided by the desired 2 hours. This gives 30 divided by 2, which equals 15 pipes.

Keep practicing — related questions