Answer:
1.50 cm^3.
Step-by-step explanation:
The ring will displace its own volume of water.
The increase in height of the water = 4.25 - 4 = 0.25 cm.
Therefore the increase in the volume = area of the base of the glass * 0.25
= 3 * 2 * 0.25
= 6 * 0.25
= 1.50 cm^3.
This is also the volume of the ring.