Question
The figure is not drawn to scale. M and N are two tanks. The base area of M is 58 cm2 while the base area of N is 58 cm2. Tank M and N contained some water and the height of the water level in Tank M was 47 cm as shown. Dan then poured some water from Tank M into Tank N. After that, the height of the water level in both tanks became 28 cm. What was the height of the water level in Tank N at first?
3 m

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The figure is not drawn to scale. M and N are two tanks. The base area of M is 58 cm2 while the base area of N is 58 cm2. Tank M and N contained some water and the height of the water level in Tank M was 47 cm as shown. Dan then poured some water from Tank M into Tank N. After that, the height of the water level in both tanks became 28 cm. What was the height of the water level in Tank N at first?