After using
111 of her sugar, Mrs Chua bought another 28 kg of sugar. As a result, Mrs Chua now has
1211 as much sugar as what she had at first. How many kilograms of sugar did Mrs Chua have at first?
|
Sugar |
Total |
Before |
11 u |
11 u |
Change 1 |
- 1 u |
|
After 1 |
10 u |
|
Change 2 |
+ 28 |
|
After 2 |
10 u + 28 |
12 u |
Fraction of sugar left after using
111 of it
= 1 -
111 =
1011 Amount of sugar left after using some = 10 u
Amount of sugar after buying 28 kg of sugar = 10 u + 28
10 u + 28 = 12 u
12 u - 10 u = 28
2 u = 28
1 u = 28 ÷ 2 = 14
Amount of sugar that Mrs Chua had at first
= 11 u
= 11 x 14
= 154 kg
Answer(s): 154 kg