Container V and Container W had 46 kg of sugar and 142.8 kg of sugar respectively. If 2 kg of sugar from Container V and 7.2 kg of sugar from Container W are used every day, how many days later will the sugar in Container V be one-third as much as the sugar in Container W?
| |
Make p the same
(1)x3 = (3) |
Container V
(1) |
Container W
(2) |
| Before |
138 |
46 |
142.8 |
| Change |
- 6 u |
- 2 u |
- 7.2 u |
| After |
3 p |
1 p |
3 p |
46 - 2 u = 1 p --- (1)
142.8 - 7.2 u =
3 p --- (2)
Make p the same.
(1)
x3 = (3)
138 - 6 u =
3 p --- (3)
(2) = (3)
142.8 - 7.2 u = 138 - 6 u
7.2 u - 6 u = 142.8 - 138
1.2 u = 4.8
1 u = 4.8 ÷ 1.2 = 4
Time taken for the sugar in Container V to be one-third as much as the sugar in Container W = 4
Answer(s): 4
