The figure is not drawn to scale. Tank H measuring 49 cm by 45 cm by 25 cm contained 11.94 ℓ of water. Tank J measuring 40 cm by 26 cm by 35 cm contained 26 ℓ of water. Michael poured some water from Tank H into Tank J without spilling and the water level of Tank J rose to 28 cm. What was the height of water level left in Tank H?
1 ℓ = 1000 cm³
26 ℓ = 26000 cm³
11.94 ℓ = 11.94 x 1000 = 11940 cm³

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

Increase in the height of water in Tank J
= 28 - 25
= 3 cm

Volume of water poured into Tank J
= 40 x 26 x 3
= 3120 cm³ 

Volume of water left in Tank H
= 11940 - 3120
= 8820 cm³ 

Height of water left in Tank H
= 8820 ÷ 49 ÷ 45
= 4 cm

Answer(s): 4 cm