Question:
Grandma has 2 rectangular tanks, Tank X and Tank Y. Tank X is an empty container with a square base of sides 30 cm. Tank Y measures 20 cm by 30 cm by 100 cm. Tank Y was 4/5 filled with water at first.
Grandma then poured some water from Tank Y into Tank X until the height of the water in Tank X became 2 times the height of the water in Tank Y.
(a) How much water was in Tank Y at first?
(b) What was the height of the water in Tank X in the end?
Solution:
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