The figure is not drawn to scale. Tank V measuring 50 cm by 44 cm by 25 cm contained 16.8 ℓ of water. Tank W measuring 40 cm by 25 cm by 36 cm contained 25 ℓ of water. Tom poured some water from Tank V into Tank W without spilling and the water level of Tank W rose to 33 cm. What was the height of water level left in Tank V?
1 ℓ = 1000 cm³
25 ℓ = 25000 cm³
16.8 ℓ = 16.8 x 1000 = 16800 cm³

Height of water in Tank W at first
= 25000 ÷ 40 ÷ 25
= 25 cm

Increase in the height of water in Tank W
= 33 - 25
= 8 cm

Volume of water poured into Tank W
= 40 x 25 x 8
= 8000 cm³ 

Volume of water left in Tank V
= 16800 - 8000
= 8800 cm³ 

Height of water left in Tank V
= 8800 ÷ 50 ÷ 44
= 4 cm

Answer(s): 4 cm