Question
The figure is not drawn to scale. U and V are two tanks. The base area of U is 35 cm2 while the base area of V is 70 cm2. Tank U and V contained some water and the height of the water level in Tank U was 49 cm as shown. Dan then poured some water from Tank U into Tank V. After that, the height of the water level in both tanks became 21 cm. What was the height of the water level in Tank V at first?
3 m

Click button first when a symbol is required. X

The figure is not drawn to scale. U and V are two tanks. The base area of U is 35 cm2 while the base area of V is 70 cm2. Tank U and V contained some water and the height of the water level in Tank U was 49 cm as shown. Dan then poured some water from Tank U into Tank V. After that, the height of the water level in both tanks became 21 cm. What was the height of the water level in Tank V at first?