The figure is not drawn to scale. Tank F measuring 51 cm by 47 cm by 22 cm contained 28.97 ℓ of water. Tank G measuring 40 cm by 25 cm by 36 cm contained 22 ℓ of water. Paul poured some water from Tank F into Tank G without spilling and the water level of Tank G rose to 27 cm. What was the height of water level left in Tank F?
1 ℓ = 1000 cm³
22 ℓ = 22000 cm³
28.97 ℓ = 28.97 x 1000 = 28970 cm³

Height of water in Tank G at first
= 22000 ÷ 40 ÷ 25
= 22 cm

Increase in the height of water in Tank G
= 27 - 22
= 5 cm

Volume of water poured into Tank G
= 40 x 25 x 5
= 5000 cm³ 

Volume of water left in Tank F
= 28970 - 5000
= 23970 cm³ 

Height of water left in Tank F
= 23970 ÷ 51 ÷ 47
= 10 cm

Answer(s): 10 cm