The figure is not drawn to scale. Tank N measuring 50 cm by 47 cm by 19 cm contained 24.75 ℓ of water. Tank P measuring 40 cm by 25 cm by 34 cm contained 19 ℓ of water. Brandon poured some water from Tank N into Tank P without spilling and the water level of Tank P rose to 32 cm. What was the height of water level left in Tank N?
1 ℓ = 1000 cm³
19 ℓ = 19000 cm³
24.75 ℓ = 24.75 x 1000 = 24750 cm³

Height of water in Tank P at first
= 19000 ÷ 40 ÷ 25
= 19 cm

Increase in the height of water in Tank P
= 32 - 19
= 13 cm

Volume of water poured into Tank P
= 40 x 25 x 13
= 13000 cm³ 

Volume of water left in Tank N
= 24750 - 13000
= 11750 cm³ 

Height of water left in Tank N
= 11750 ÷ 50 ÷ 47
= 5 cm

Answer(s): 5 cm