Project 1 - Build a Floating Bowl Water Clock

Last updated at May 4, 2026 by

Objective: Build a Ghatika-yantra-style water clock that sinks in close to 24 minutes.

Materials: Bowls of different sizes, a large vessel of water, a needle, a stopwatch.

Procedure:

  1. Make a small hole at the bottom of a bowl.
  2. Float it on water in a larger vessel.
  3. Time how long it takes to fill and sink.
  4. Try different bowl sizes and hole sizes till the time is close to 24 minutes.

What to observe: Smaller holes and larger bowls take longer to sink.

Remove Ads Share on WhatsApp
CA Maninder Singh's photo - Co-founder, Teachoo

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant with 16+ years of practical experience and 20+ years of teaching experience. At Teachoo, he simplifies Accounts, Tax and GST with step-by-step examples so students can apply concepts confidently in exams and real life.

For an uninterrupted learning experience, students can use Teachoo Black to remove ads and focus better.