Question
The figure is not drawn to scale. X and Y are two tanks. The base area of X is 22 cm2 while the base area of Y is 55 cm2. Tank X and Y contained some water and the height of the water level in Tank X was 51 cm as shown. Dan then poured some water from Tank X into Tank Y. After that, the height of the water level in both tanks became 26 cm. What was the height of the water level in Tank Y at first?
3 m

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The figure is not drawn to scale. X and Y are two tanks. The base area of X is 22 cm2 while the base area of Y is 55 cm2. Tank X and Y contained some water and the height of the water level in Tank X was 51 cm as shown. Dan then poured some water from Tank X into Tank Y. After that, the height of the water level in both tanks became 26 cm. What was the height of the water level in Tank Y at first?