The figure is not drawn to scale. Tank H measuring 49 cm by 44 cm by 23 cm contained 13.78 ℓ of water. Tank J measuring 40 cm by 25 cm by 37 cm contained 23 ℓ of water. Sam poured some water from Tank H into Tank J without spilling and the water level of Tank J rose to 26 cm. What was the height of water level left in Tank H?
1 ℓ = 1000 cm³
23 ℓ = 23000 cm³
13.78 ℓ = 13.78 x 1000 = 13780 cm³

Height of water in Tank J at first
= 23000 ÷ 40 ÷ 25
= 23 cm

Increase in the height of water in Tank J
= 26 - 23
= 3 cm

Volume of water poured into Tank J
= 40 x 25 x 3
= 3000 cm³ 

Volume of water left in Tank H
= 13780 - 3000
= 10780 cm³ 

Height of water left in Tank H
= 10780 ÷ 49 ÷ 44
= 5 cm

Answer(s): 5 cm