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An iron cube of side 5 cm and density 5 g/cm³ is fully immersed in water (density 1 g/cm³) and weighed in this submerged state. What is its apparent weight? (express in gram-weight)
- 5x5x5 gm wt
- 4x4x4x5 gm wt
- 3x5x5x5 gm wt
- 4x5x5x5 gm wt
Correct answer: 4x5x5x5 gm wt
Solution
When fully submerged, the upthrust equals the weight of displaced water. Subtract this from the actual weight to get the apparent weight.
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