A metal ball of density 7800 kg/m 3 is suspected to have a large number of inner…
Physics · JEE Main · NTA Exams — Properties of Solids and Liquids
A metal ball of density 7800 kg/m3 is suspected to have a large number of inner cavities. It weighs 9.8 kg when weighed directly on a balance and 1.5 kg less when immersed in water. The fraction by volume of the cavities in the metal ball is apporximately:
- 20%
- 30%
- 16%
- 11%
Answer
(C) 16%
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