The figure is not drawn to scale. T and U are two containers. The base area of T is 26 cm² while the base area of U is 62 cm². Container T and U contained some water and the height of the water level in Container T was 53 cm as shown. Dan then poured some water from Container T into Container U. After that, the height of the water level in both tanks became 22 cm. What was the height of the water level in Container U at first?
Change in the water level of Container T
= 53 - 22
= 31 cm

Volume of water poured in the Container U
= 26 x 31
= 806 cm³ 

Height increase in Container U
= 806 ÷ 62
= 13 cm

Original height of the water in Container U
= 22 - 13
= 9 cm

Answer(s): 9 cm