The figure is not drawn to scale. Tank E measuring 52 cm by 45 cm by 25 cm contained 27.06 ℓ of water. Tank F measuring 40 cm by 25 cm by 36 cm contained 25 ℓ of water. Asher poured some water from Tank E into Tank F without spilling and the water level of Tank F rose to 31 cm. What was the height of water level left in Tank E?
1 ℓ = 1000 cm³
25 ℓ = 25000 cm³
27.06 ℓ = 27.06 x 1000 = 27060 cm³

Height of water in Tank F at first
= 25000 ÷ 40 ÷ 25
= 25 cm

Increase in the height of water in Tank F
= 31 - 25
= 6 cm

Volume of water poured into Tank F
= 40 x 25 x 6
= 6000 cm³ 

Volume of water left in Tank E
= 27060 - 6000
= 21060 cm³ 

Height of water left in Tank E
= 21060 ÷ 52 ÷ 45
= 9 cm

Answer(s): 9 cm