The figure is not drawn to scale. F and G are two containers. The base area of F is 14 cm² while the base area of G is 70 cm². Container F and G contained some water and the height of the water level in Container F was 65 cm as shown. Dan then poured some water from Container F into Container G. After that, the height of the water level in both tanks became 25 cm. What was the height of the water level in Container G at first?
Change in the water level of Container F
= 65 - 25
= 40 cm

Volume of water poured in the Container G
= 14 x 40
= 560 cm³ 

Height increase in Container G
= 560 ÷ 70
= 8 cm

Original height of the water in Container G
= 25 - 8
= 17 cm

Answer(s): 17 cm