David drank
56 of the milk in his milk bottle. He accidentally spilled
35 of the remaining milk. As a result, he had 120 mℓ of milk left in his milk bottle. How much milk did David have at first? Give your answer in mℓ.
Drank |
Remaining milk |
Total |
5x5 |
1x5 |
6x5 |
|
Spilled |
Left |
|
|
3x1 |
2x1 |
|
25 u |
3 u |
2 u |
30 u |
Fraction of remaining milk left after David spilled some
= 1 -
56=
16The volume of the remaining milk is the combined repeated identity. Make the volume of remaining milk the same. LCM of 1 and 5 is 5.
Volume of water left = 2 u
2 u = 120
1 u = 120 ÷ 2 = 60
Total volume of water that David had at first
= 30 u
= 30 x 60
= 1800 mℓ
Answer(s): 1800 mℓ