Question
The figure is not drawn to scale. V and W are two tanks. The base area of V is 18 cm2 while the base area of W is 40 cm2. Tank V and W contained some water and the height of the water level in Tank V was 53 cm as shown. Dan then poured some water from Tank V into Tank W. After that, the height of the water level in both tanks became 30 cm. What was the height of the water level in Tank W at first?
3 m

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The figure is not drawn to scale. V and W are two tanks. The base area of V is 18 cm2 while the base area of W is 40 cm2. Tank V and W contained some water and the height of the water level in Tank V was 53 cm as shown. Dan then poured some water from Tank V into Tank W. After that, the height of the water level in both tanks became 30 cm. What was the height of the water level in Tank W at first?