The figure is not drawn to scale. Tank Z measuring 54 cm by 45 cm by 25 cm contained 9.37 ℓ of water. Tank A measuring 40 cm by 26 cm by 34 cm contained 26 ℓ of water. Tom poured some water from Tank Z into Tank A without spilling and the water level of Tank A rose to 27 cm. What was the height of water level left in Tank Z?
1 ℓ = 1000 cm³
26 ℓ = 26000 cm³
9.37 ℓ = 9.37 x 1000 = 9370 cm³

Height of water in Tank A at first
= 26000 ÷ 40 ÷ 26
= 25 cm

Increase in the height of water in Tank A
= 27 - 25
= 2 cm

Volume of water poured into Tank A
= 40 x 26 x 2
= 2080 cm³ 

Volume of water left in Tank Z
= 9370 - 2080
= 7290 cm³ 

Height of water left in Tank Z
= 7290 ÷ 54 ÷ 45
= 3 cm

Answer(s): 3 cm