Luke drank
23 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 Luke have at first? Give your answer in mℓ.
| Drank |
Remaining milk |
Total |
| 2x3 |
1x3 |
3x3 |
| |
Spilled |
Left |
|
| |
1x1 |
2x1 |
|
| 6 u |
1 u |
2 u |
9 u |
Fraction of remaining milk left after Luke spilled some
= 1 -
23=
13The 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 Luke had at first
= 9 u
= 9 x 10
= 90 mℓ
Answer(s): 90 mℓ
