The figure is not drawn to scale. Tank S measuring 54 cm by 45 cm by 25 cm contained 15.9 ℓ of water. Tank T measuring 44 cm by 30 cm by 32 cm contained 33 ℓ of water. Bobby poured some water from Tank S into Tank T without spilling and the water level of Tank T rose to 26 cm. What was the height of water level left in Tank S?
1 ℓ = 1000 cm³
33 ℓ = 33000 cm³
15.9 ℓ = 15.9 x 1000 = 15900 cm³

Height of water in Tank T at first
= 33000 ÷ 44 ÷ 30
= 25 cm

Increase in the height of water in Tank T
= 26 - 25
= 1 cm

Volume of water poured into Tank T
= 44 x 30 x 1
= 1320 cm³ 

Volume of water left in Tank S
= 15900 - 1320
= 14580 cm³ 

Height of water left in Tank S
= 14580 ÷ 54 ÷ 45
= 6 cm

Answer(s): 6 cm