The figure is not drawn to scale. Tank V measuring 55 cm by 45 cm by 20 cm contained 18.3 ℓ of water. Tank W measuring 40 cm by 30 cm by 32 cm contained 24 ℓ of water. Seth poured some water from Tank V into Tank W without spilling and the water level of Tank W rose to 27 cm. What was the height of water level left in Tank V?
1 ℓ = 1000 cm³
24 ℓ = 24000 cm³
18.3 ℓ = 18.3 x 1000 = 18300 cm³

Height of water in Tank W at first
= 24000 ÷ 40 ÷ 30
= 20 cm

Increase in the height of water in Tank W
= 27 - 20
= 7 cm

Volume of water poured into Tank W
= 40 x 30 x 7
= 8400 cm³ 

Volume of water left in Tank V
= 18300 - 8400
= 9900 cm³ 

Height of water left in Tank V
= 9900 ÷ 55 ÷ 45
= 4 cm

Answer(s): 4 cm