Can someone please explain what I’m doing wrong here? I don’t understand the explanation that is provided in the GRE QR

- Found volume of the tank (110\times90\times70) = 2673000
- The above volume is the max so the volume of water should be 10% less than the volume of the tank. Volume of water = 0.9 \times 2673000 = 2405700
- Volume of water: 110 \times 90 \times h = 2405700
- h = 2405700/9900
- h = 243