Bryan drank
12 of the milk in his milk bottle. He accidentally spilled
13 of the remaining milk. As a result, he had 20 mℓ of milk left in his milk bottle. How much milk did Bryan have at first? Give your answer in mℓ.
Drank |
Remaining milk |
Total |
1x3 |
1x3 |
2x3 |
|
Spilled |
Left |
|
|
1x1 |
2x1 |
|
3 u |
1 u |
2 u |
6 u |
Fraction of remaining milk left after Bryan spilled some
= 1 -
12=
12The volume of the remaining milk is the combined repeated identity. Make the volume of remaining milk the same. LCM of 1 and 3 is 3.
Volume of water left = 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Total volume of water that Bryan had at first
= 6 u
= 6 x 10
= 60 mℓ
Answer(s): 60 mℓ