The figure is not drawn to scale. Tank E measuring 50 cm by 44 cm by 19 cm contained 12.4 ℓ of water. Tank F measuring 40 cm by 25 cm by 35 cm contained 19 ℓ of water. Reggie poured some water from Tank E into Tank F without spilling and the water level of Tank F rose to 27 cm. What was the height of water level left in Tank E?
1 ℓ = 1000 cm³
19 ℓ = 19000 cm³
12.4 ℓ = 12.4 x 1000 = 12400 cm³

Height of water in Tank F at first
= 19000 ÷ 40 ÷ 25
= 19 cm

Increase in the height of water in Tank F
= 27 - 19
= 8 cm

Volume of water poured into Tank F
= 40 x 25 x 8
= 8000 cm³ 

Volume of water left in Tank E
= 12400 - 8000
= 4400 cm³ 

Height of water left in Tank E
= 4400 ÷ 50 ÷ 44
= 2 cm

Answer(s): 2 cm