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CTET 7 Feb 2026 Paper 1, Question 60

Topic: Volume and capacity

Q60

A primary class mathematics teacher brings in two jars of different shapes, with water in one of them, to her classroom. She pours water completely from the taller, thin jar to the shorter, broad jar. She then asks the question, “Which jar can hold more water?”
This activity is most appropriate to teach

  1. (1) how to calculate the area of two jars with different shapes
  2. (2) formula for calculating volume
  3. (3) volume and its conservationCorrect answer
  4. (4) the concept of standard units of measurement of liquids

Solution.

CBSE answer: (3)

Answer: (3) volume and its conservation

  1. The same water is poured from a tall, thin jar into a short, broad jar; nothing is added or lost.
  2. Young children often judge by height and think the tall jar had more water.
  3. The activity helps them see that the amount stays the same even when the shape of the container changes. This is Piaget's conservation of volume.
  4. No formula, area or standard unit is involved, so (1), (2) and (4) do not fit.