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A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright...

Physics
JAMB 1989
A piece of wood of mass 40g and uniform cross-sectional area of 2cm2 floats upright in water. The length of the wood immersed is
  • A. 30cm
  • B. 40cm
  • C. 20cm
  • D. 2cm
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Correct Answer: Option C
Explanation
Mw displaced = 40g

density = \(\frac{mass}{\text{area x height}}\)

I = \(\frac{40}{2\times h}\)

h = 20cm
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