Length, breadth and thickness of a uniform strip are measured as 10.5 cm, 0.05 mm and 6.0 μm, respectively. Which option(s) give(s) the volume in cm³ with correct significant figures?
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Question

Length, breadth and thickness of a uniform strip are measured as 10.5 cm, 0.05 mm and 6.0 μm, respectively. Which option(s) give(s) the volume in cm³ with correct significant figures?

G1 Physics · Accepted Answer

Convert all dimensions to cm: 0.05 mm = 0.005 cm, 6.0 μm = 6.0 × 10⁻⁴ cm. V = 10.5 × 0.005 × 6.0 × 10⁻⁴ = 3.15 × 10⁻⁵ cm³. The limiting measurement 0.05 has one significant figure, so the final result must have one significant figure: V = 3 × 10⁻⁵ cm³. Only option D is correct.