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JEE Main 2025 Apr 3 Shift 1, Physics Q17: Measurements

JEE Main2025Apr 3, Shift 1Physics
Q.

A person measures mass of 3 different particles as 435.42 g, 226.3 g and 0.125 g. According to the rules for arithmetic operations with significant figures, the additions of the masses of 3 particles will be.

  1. A

    661.845 g

  2. B

    662 g

  3. C

    661.8 g

  4. D

    661.84 g

Solution

For addition, the result must be rounded to the same number of decimal places as the term with the fewest decimal places.

The three values 435.42 (2 dp), 226.3 (1 dp), 0.125 (3 dp) have the least precise term carrying only 1 decimal place (226.3).

Raw sum: g.

Rounded to 1 decimal place: g.

Concept behind this question

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