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NEET 2026, Physics Q42: Units And Dimensions

NEET2026Physics
Q.

Each side of a metallic cube of mass 5.580 kg is measured to be 9.0 cm. Keeping the significant figures in view, the density of the material of the cube can be best expressed as kg m, where the value of X is :

  1. A

    7.654

  2. B

    7.7

  3. C

    7.65

  4. D

    7.6

Solution

Density kg/m.

The side length 9.0 cm is given to 2 significant figures, which is the limiting precision. Rounding the result to 2 significant figures gives kg/m. Hence X = 7.7.

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