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If a plastic sphere floats in water (density = 1000kgm3...

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

A.

800kgm3

B.

1200kgm3

C.

1250kgm3

D.

2000kgm3

Correct answer is A

R.d = 0.40.5 = 0.8

0.8 = Density of oilDensity of water

0.8 = Density of oil1000

Density of oil = 800kgm3