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WAEC 2025

A body weighing 10N in air is partially immersed in water. It displaces water of mass 0.3kg. What is the upthrust on the body?(g = 10m/s\(^2\))

  1. A7.0N
  2. B13.0N
  3. C3.3N
  4. D3.0N

Explanation

According to Archimedes' Principle, upthrust is equal to the weight of the fluid displaced. Upthrust = mass of water displaced × g = 0.3 kg × 10 m/s² = 3.0 N.

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