Barbara had some coffee. Each day, she drank an equal amount of coffee. At the end of the fourth day, she had 1700 mℓ of coffee left. At the end of the fifth day, she had 1400 mℓ of coffee left.
- What was the amount of coffee she drank each day?
- How much coffee did Barbara have at first? Give your answer in litres and millilitres.
(a)
Volume of coffee that Barbara drank each day
= 1700 - 1400
= 300 mℓ
(b)
Volume of coffee that Barbara had at first
= 1700 + 300 x 4
= 1700 + 1200
= 2900 mℓ
1000 mℓ = 1 ℓ
2900 mℓ = 2 ℓ 900 mℓ
Volume of coffee that Barbara had at first = 2 ℓ 900 mℓ
Answer(s): (a) 300 mℓ; (b) 2 ℓ 900 mℓ