Y and Z are two rectangular tanks. The base area of Y is 300 cm2 and the base of Z has dimensions as shown. Tank Y contained 9000 cm3 of water and Tank Z was empty.
- What was the height of the water level in Y?
- Pierre poured some water from Tank Y into Tank Z without spilling. After that, the height of the water level of Tank Y was the same as that of Tank Z. How much water did Pierre pour into Tank Z?