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Concepts Of Physics MCQ Edition [Volume 1]
Exam
Concepts Of Physics MCQ Edition [Volume 1]
Subject
Physics
Chapter
Physics and Mathematics

Concepts Of Physics MCQ Edition [Volume 1] · Physics · Physics and Mathematics

Using a slide callipers, the length and radius of a cylinder are...

Using a slide callipers, the length and radius of a cylinder are measured as 4.54 cm4.54 \text{ cm} and 1.75 cm1.75 \text{ cm}, respectively. Compute the volume of the cylinder.

Options

  1. A14.6 cm314.6 \text{ cm}^3
  2. B43.7 cm343.7 \text{ cm}^3
  3. C25.0 cm325.0 \text{ cm}^3
  4. D43.68 cm343.68 \text{ cm}^3

Correct answer

B. 43.7 cm343.7 \text{ cm}^3

Step-by-step solution

The volume of a cylinder is given by the formula V=πr2lV = \pi r^2 l

Substituting the given values, r=1.75 cmr = 1.75 \text{ cm} and l=4.54 cml = 4.54 \text{ cm}:

V=π×(1.75)2×4.54V = \pi \times (1.75)^2 \times 4.54

V=3.1416×3.0625×4.54=43.682 cm3V = 3.1416 \times 3.0625 \times 4.54 = 43.682 \text{ cm}^3

Since the measured quantities rr and ll both have 33 significant figures, the final result must be rounded off to 33 significant figures.

Rounding off 43.68243.682 to 33 significant figures, we get 43.7 cm343.7 \text{ cm}^3.
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