Answer:
Volume of water = 34[tex]ft^{2}[/tex]
Step-by-step explanation:
Right now the tank is full with water and the block so:
Volume of tank = Volume of block + Volume of water in the tank
1. Find volume of tank
5 x 2 x 4 = 40
2. Find volume of block
2 x 1 x 3 = 6
3. Find volume of water
40 = 6 + Volume of water
Volume of water = 34[tex]ft^{2}[/tex]