Multiple choice

A large pipe has the capacity to fill a cistern in 8 hours. Four smaller pipes, with one-fourth the efficiency as that of larger pipe, are attached to the cistern. Find the ratio of time taken by each small pipe to fill a cistern to the time taken by larger pipe to fill the cistern alone?

  1. 4:1

  2. 2:5

  3. 1:4

  4. 1:3

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The large pipe fills the cistern in 8 hours. A small pipe with 1/4 efficiency will take 4 times longer = 32 hours. The ratio of small pipe time to large pipe time is 32:8 = 4:1.

Keep practicing — related questions