The figure is not drawn to scale. Tank L measuring 48 cm by 47 cm by 25 cm contained 17.04 ℓ of water. Tank M measuring 45 cm by 32 cm by 35 cm contained 36 ℓ of water. Vincent poured some water from Tank L into Tank M without spilling and the water level of Tank M rose to 29 cm. What was the height of water level left in Tank L?
1 ℓ = 1000 cm³
36 ℓ = 36000 cm³
17.04 ℓ = 17.04 x 1000 = 17040 cm³

Height of water in Tank M at first
= 36000 ÷ 45 ÷ 32
= 25 cm

Increase in the height of water in Tank M
= 29 - 25
= 4 cm

Volume of water poured into Tank M
= 45 x 32 x 4
= 5760 cm³ 

Volume of water left in Tank L
= 17040 - 5760
= 11280 cm³ 

Height of water left in Tank L
= 11280 ÷ 48 ÷ 47
= 5 cm

Answer(s): 5 cm