The figure shows a container ⁴₅ filled with water. The container is made up of two cuboids. The top cuboid has a square base of length 20 cm and height of 30 cm. The bottom cuboid has a square base of length 10 cm and height 20 cm. Find the height of the water level from the base of the container.
Volume of the top cuboid
= 20 x 20 x 30
= 12000 cm³ 

Volume of the bottom cuboid
= 10 x 10 x 20
= 2000 cm³ 

Total volume
= 12000 + 2000
= 14000 cm³ 

1 container = 14000 cm^3 
4₅ container = 14000 x ⁴₅ = 11200 cm³ 

Volume of water in the top cuboid
= 11200 - 2000
= 9200 cm³ 

Base Area of the top cuboid
= 20 x 20
= 400 cm² 

Height of water in the top cuboid
= 9200 ÷ 400
= 23 cm

Height of water from base
= 23 + 20
= 43 cm

Answer(s): 43 cm