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Class 6
Chapter 10 Class 6 - Motion and Measurement of Distances
  • The length of a curved surface cannot be measured using a scale.
  • We can measure the length of a curved surface by using a thread

Example - 

  1. Measure a curved line AB with the help of a thread.
  2. Put a knot on the thread near one of its ends, place this knot at point A
  3. Keep moving the thread along its line by using your fingers and thumb.
  4. Use this process till the other end B is reached
  5. Mark the ends of the thread A and B
  6. Now, stretch the thread along a metre scale
  7. Measure the length from beginning to the final mark
  8. We get the length of the curved surface.

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo