The figure is not drawn to scale. Container Q is filled with water to a height of 15 cm. The water in Container Q is poured into 2 rectangular tanks, Container R and Container S, such that the heights of the water in the 3 tanks are equal. Find the volume of water poured out of Container Q in litres.
Volume of water
= 60 x 28 x 15
= 25200 cm³ 

Combined base area
= (60 x 28) + (25 x 22) + (17 x 10)
= 1680 + 550 + 170
= 2400 cm² 

Height of water after pouring
= 25200 ÷ 2400
= 10.5 cm

Difference in the height of water
= 15 - 10.5
= 4.5 cm

Volume of water poured out of Container Q
= 60 x 28 x 4.5
= 7560 cm³ 

1000 cm³ = 1 ℓ
7560 cm³ = 7560 ÷ 1000 = 7.56 ℓ

Answer(s): 7.56 ℓ