NCERT Example 4 - Pumps - Proportional Reasoning-2

Question: 2 pumps can fill a tank in 18 hours. How long if we add 2 more identical pumps?

Answer: 9 hours.

Full step-by-step NCERT solution with diagrams on Something by Zero.

All Chapter 3 solutions

Something by Zero offers free NCERT books, chapter solutions, revision notes, formula sheets, and interactive study tools for CBSE Classes 6–12. Enable JavaScript for the full experience, or visit our Science & Tech Glossary.