Container E and Container F had 35 kg of rice flour and 119.4 kg of rice flour respectively. If 2 kg of rice flour from Container E and 7.8 kg of rice flour from Container F are used every day, how many days later will the rice flour in Container E be one-third as much as the rice flour in Container F?
|
Make p the same (1)x3 = (3) |
Container E (1) |
Container F (2) |
Before |
105 |
35 |
119.4 |
Change |
- 6 u |
- 2 u |
- 7.8 u |
After |
3 p |
1 p |
3 p |
35 - 2 u = 1 p --- (1)
119.4 - 7.8 u =
3 p --- (2)
Make p the same.
(1)
x3 = (3)
105 - 6 u =
3 p --- (3)
(2) = (3)
119.4 - 7.8 u = 105 - 6 u
7.8 u - 6 u = 119.4 - 105
1.8 u = 14.4
1 u = 14.4 ÷ 1.8 = 8
Time taken for the rice flour in Container E to be one-third as much as the rice flour in Container F = 8
Answer(s): 8