A) 0.8 g/cc
B) 2.8 g/cc
C) 1.8 g/cc
D) 0.28 g/cc
Correct Answer: B
Solution :
As the flask floats in water when less than half filled with water, it will float just fully submerged when half filled. In this situation, mass of flask + mass of water in it \[=V\sigma \] i.e., \[390+250=V\times 1\] (as ) 390 + 250 = V x 1 (as \[\sigma =1g/cc\]) i.e., outer volume of flask V = 640 cc Now as inner volume of flask is given to be 500 cc, so the volume of the material of flask \[=640-500=140\,cc.\]But as mass of flask is 390 g, so density of material of flask \[\rho =\frac{m}{V}\] \[=\frac{390}{140}=2.8\,g/cc\]You need to login to perform this action.
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