First, we want to convert the volume of water into cubic centimeters, which is very easy since 1 Liter = 1,000cm3. So, we have 5,950cm3 of water.
We know that the Volume of the tank is equal to the Area of the base times the height. V = Ab x H
Our formula becomes 5,950cm3 = 700cm2 x H
We then divide 5,950cm3 by 700cm2 to give us the height, which is 8.5cm.