The figure shows an empty rectangular container with a capacity of 45 ℓ. The container has a height of 18 cm. Tap G filled the container at a rate of 2.7 ℓ per minute. Tap H drained water from the container at a rate of 1.1 ℓ per minute. Both taps were turned on for 19 minutes and then turned off.

1. What is the base area of the container?
2. After both taps were turned off, how much more water is needed to fill the container completely? Give your answer in litres.

(a)
1 ℓ = 1000 mℓ
45 ℓ = 45 x 1000 = 45000 mℓ

Base area of the container
= ^Volume_height 
= ⁴⁵⁰⁰⁰₁₈
= 2500 cm²

(b)
Volume of water that filled the container per minute when both taps were turned on
= 2.7 - 1.1
= 1.6 ℓ

Volume of water that filled the container in 19 minutes when both taps were turned on
= 19 x 1.6
= 30.4 ℓ

Volume of water needed to fill the container
= 45 - 30.4
= 14.6 ℓ

Answer(s): (a) 2500 cm²; (b) 14.6 ℓ