Physics-
General
Easy
Question
A metal ball of density 7800 
is suspected to have a large number of 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 approximately:
- 20 %
- 30 %
- 16 %
- 11 %
The correct answer is: 16 %
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