The figure is not drawn to scale. K and L are two containers. The base area of K is 19 cm² while the base area of L is 58 cm². Container K and L contained some water and the height of the water level in Container K was 44 cm as shown. Dan then poured some water from Container K into Container L. After that, the height of the water level in both tanks became 15 cm. What was the height of the water level in Container L at first?
Change in the water level of Container K
= 44 - 15
= 29 cm

Volume of water poured in the Container L
= 19 x 29
= 551 cm³ 

Height increase in Container L
= 551 ÷ 58
= 9.5 cm

Original height of the water in Container L
= 15 - 9.5
= 5.5 cm

Answer(s): 5.5 cm