Solve question 3.
Q.3. You are provided with a hollow iron ball A of volume 15 $c{m}^3$ and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub. (a) Find upthrust on each ball. (b) Which ball will sink ? Give reason for your answer. (Density of iron = 8.0 g $c{m}^{-3}$)