The figure is not drawn to scale. Tank Q measuring 48 cm by 44 cm by 20 cm contained 29.52 ℓ of water. Tank R measuring 40 cm by 35 cm by 37 cm contained 28 ℓ of water. Albert poured some water from Tank Q into Tank R without spilling and the water level of Tank R rose to 26 cm. What was the height of water level left in Tank Q?
1 ℓ = 1000 cm³
28 ℓ = 28000 cm³
29.52 ℓ = 29.52 x 1000 = 29520 cm³

Height of water in Tank R at first
= 28000 ÷ 40 ÷ 35
= 20 cm

Increase in the height of water in Tank R
= 26 - 20
= 6 cm

Volume of water poured into Tank R
= 40 x 35 x 6
= 8400 cm³ 

Volume of water left in Tank Q
= 29520 - 8400
= 21120 cm³ 

Height of water left in Tank Q
= 21120 ÷ 48 ÷ 44
= 10 cm

Answer(s): 10 cm