The figure is not drawn to scale. V and W are two containers. The base area of V is 48 cm² while the base area of W is 50 cm². Container V and W contained some water and the height of the water level in Container V was 43 cm as shown. Dan then poured some water from Container V into Container W. After that, the height of the water level in both tanks became 28 cm. What was the height of the water level in Container W at first?
Change in the water level of Container V
= 43 - 28
= 15 cm

Volume of water poured in the Container W
= 48 x 15
= 720 cm³ 

Height increase in Container W
= 720 ÷ 50
= 14.4 cm

Original height of the water in Container W
= 28 - 14.4
= 13.6 cm

Answer(s): 13.6 cm