Min had some coffee. Each day, she drank an equal amount of coffee. At the end of the ninth day, she had 1500 mℓ of coffee left. At the end of the tenth day, she had 1100 mℓ of coffee left.
- What was the amount of coffee she drank each day?
- How much coffee did Min have at first? Give your answer in litres and millilitres.
(a)
Volume of coffee that Min drank each day
= 1500 - 1100
= 400 mℓ
(b)
Volume of coffee that Min had at first
= 1500 + 400 x 9
= 1500 + 3600
= 5100 mℓ
1000 mℓ = 1 ℓ
5100 mℓ = 5 ℓ 100 mℓ
Volume of coffee that Min had at first = 5 ℓ 100 mℓ
Answer(s): (a) 400 mℓ; (b) 5 ℓ 100 mℓ