Anna had 1760 mℓ more milk than Nicole. After Anna gave Nicole 400 mℓ of milk, the ratio of Anna's milk to Nicole's milk became 7 : 3. How much milk did Anna have at first? Give your answer in millilitres.
|
Anna |
Nicole |
Difference |
Before |
1 u + 1760 |
1 u |
1760 |
Change |
- 400 |
+ 400 |
|
After |
1 u + 1360 |
1 u + 400 |
960 |
Comparing Anna and Nicole in the end |
7 p |
3 p |
4 p |
Volume of milk that Anna had in the end
= 1 u + 1760 - 400
= 1 u + 1360
Difference in the volume of milk between Anna and Nicole in the end
= 7 p - 3 p
= 4 p
4 p = 1360 - 400
4 p = 960
1 p = 960 ÷ 4 = 240
Volume of milk that Anna had at first
= 7 p + 400
= 7 x 240 + 400
= 1680 + 400
= 2080 mℓ
Answer(s): 2080 mℓ