The figure shows an empty transparent tank made from three containers. The two containers M and N on top are in the form of cuboids which have square bases of side 8 cm and 4 cm as shown in the figure. The bottom container is in the form of a cube of side 10 cm. 2.12 ℓ of water are poured into the empty vase. Find the height of the water level from the base of the vase. (1 litre = 1000 cm³)
Volume of the bottom container
= 10 x 10 x 10
= 1000 cm³ 

Base area of container M
= 8 x 8
= 64 cm²

Base area of container N
= 4 x 4
= 16 cm²

Combined base areas of the containers on top
= 64 + 16
= 80 cm²

2.12 ℓ = 2120 mℓ

Volume of water inside the containers on top only
= 2120 - 1000
= 1120 mℓ

Height of water of the containers on top only
= 1120 ÷ 80
= 14 cm

Total height of water level
= 10 + 14
= 24 cm

Answer(s): 24 cm