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Question

A block of wood is floating on oil with half of its volume submerged. If the density of oil 840kgm3, the relative density of wood (relative to water) is

A
0.84
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B
0.42
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C
0.21
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D
1
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Solution

The correct option is B 0.42
vV=dwdL
12=dw840dw=420kg/m3
R.D.=420103=0.42

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