A cylindrical rod has its diameter measured by a screw gauge as 8.04 mm after zero correction and its length measured by a vernier calipers as 5.12 cm after zero correction. Its volume is closest to:
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Question

A cylindrical rod has its diameter measured by a screw gauge as 8.04 mm after zero correction and its length measured by a vernier calipers as 5.12 cm after zero correction. Its volume is closest to:

G1 Physics · Accepted Answer

Diameter = 8.04 mm = 0.804 cm, so radius = 0.402 cm. Volume = πr²l ≈ 3.14 × (0.402)² × 5.12 ≈ 2.60 cm³.