A) 20%
B) 35%
C) 10%
D) 25%
Correct Answer: C
Solution :
Let the total volume of ice-berg is V and its density is r. If this ice-berg floats in water with volume Vin inside it then \[{{V}_{in}}\sigma g=V\rho g\] Þ \[{{V}_{in}}=\left( \frac{\rho }{\sigma } \right)\ V\] [\[\sigma =\]density of water] or \[{{V}_{out}}=V-{{V}_{in}}=\left( \frac{\sigma -\rho }{\sigma } \right)\ V\] Þ \[\frac{{{V}_{out}}}{V}=\left( \frac{\sigma -\rho }{\sigma } \right)=\frac{1000-900}{1000}=\frac{1}{10}\] \ \[{{V}_{out}}=10%\] of V
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