Question
The figure is not drawn to scale. Q and R are two containers. The base area of Q is 41 cm2 while the base area of R is 41 cm2. Container Q and R contained some water and the height of the water level in Container Q was 41 cm as shown. Dan then poured some water from Container Q into Container R. After that, the height of the water level in both tanks became 25 cm. What was the height of the water level in Container R at first?
3 m

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The figure is not drawn to scale. Q and R are two containers. The base area of Q is 41 cm2 while the base area of R is 41 cm2. Container Q and R contained some water and the height of the water level in Container Q was 41 cm as shown. Dan then poured some water from Container Q into Container R. After that, the height of the water level in both tanks became 25 cm. What was the height of the water level in Container R at first?