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If a plastic sphere floats in water (density = 1000kgm3) with 0.5 of its volume ...

If a plastic sphere floats in water (density = 1000kgm3) with 0.5 of its volume submerged, and floats in oil with 0.4 of its volume submerged the density of the oil is
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  • A 800kgm3
  • B 1200kgm3
  • C 1250kgm3
  • D 2000kgm3
Correct Answer: Option A
Explanation:
R.d = \(\frac{0.4}{0.5}\) = 0.8
0.8 = \(\frac{\text {Density of oil}}{\text{Density of water}}\)
0.8 = \(\frac{\text {Density of oil}}{1000}\)
Density of oil = 800kgm3

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