The figure is not drawn to scale. L and M are two containers. The base area of L is 13 cm² while the base area of M is 25 cm². Container L and M contained some water and the height of the water level in Container L was 55 cm as shown. Dan then poured some water from Container L into Container M. After that, the height of the water level in both tanks became 27 cm. What was the height of the water level in Container M at first?
Change in the water level of Container L
= 55 - 27
= 28 cm

Volume of water poured in the Container M
= 13 x 28
= 364 cm³ 

Height increase in Container M
= 364 ÷ 25
= 14.56 cm

Original height of the water in Container M
= 27 - 14.56
= 12.44 cm

Answer(s): 12.44 cm