Erika had some soy milk. Each day, she drank an equal amount of soy milk. At the end of the sixth day, she had 1300 mℓ of soy milk left. At the end of the seventh day, she had 1000 mℓ of soy milk left.
- What was the amount of soy milk she drank each day?
- How much soy milk did Erika have at first? Give your answer in litres and millilitres.
(a)
Volume of soy milk that Erika drank each day
= 1300 - 1000
= 300 mℓ
(b)
Volume of soy milk that Erika had at first
= 1300 + 300 x 6
= 1300 + 1800
= 3100 mℓ
1000 mℓ = 1 ℓ
3100 mℓ = 3 ℓ 100 mℓ
Volume of soy milk that Erika had at first = 3 ℓ 100 mℓ
Answer(s): (a) 300 mℓ; (b) 3 ℓ 100 mℓ