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Question

A 700g solid cube having an edge of length 10cm floats in water. How much volume of the cube is outside the water? Density of water 1000kgm3

A
30cm3
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B
300cm3
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C
700cm3
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D
1000cm3
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Solution

The correct option is A 30cm3
Density of water =1000kf/m3=1gm/cm3
Cube is of 700gm so we need to calculate volume of water having mass 700gm which is =m/d=700/1=700cm3

Now the cube need to be 700cm3 inside the water to displace this volume of water but full volume of cube=103=1000cm3 so 1000700=300cm3 of cube will be outside the water.
Option B is correct.

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