A plastic ball has a mass of $4.0\,\text{g}$ and occupies a volume of $20\,\text{cm}^3$. A crack is present in the ball’s surface. The ball is put into a bath of water. Water enters the ball without any change in the ball’s volume and, after a while, the ball sinks. The density of water $= 1.0\,\text{g}\,\text{cm}^{-3}$. What mass of water has entered the ball when the top of the ball is first level with the water surface?
- A$5.0\,\text{g}$
- B$16\,\text{g}$
- C$20\,\text{g}$
- D$24\,\text{g}$