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

800kgm³

1200kgm³

1250kgm³

2000kgm³

Correct answer is A

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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