After using
110 of her sugar, Mrs Loo bought another 24 kg of sugar. As a result, Mrs Loo now has
1210 as much sugar as what she had at first. How many kilograms of sugar did Mrs Loo have at first?
| |
Sugar |
Total |
| Before |
10 u |
10 u |
| Change 1 |
- 1 u |
|
| After 1 |
9 u |
|
| Change 2 |
+ 24 |
|
| After 2 |
9 u + 24 |
12 u |
Fraction of sugar left after using
110 of it
= 1 -
110 =
910 Amount of sugar left after using some = 9 u
Amount of sugar after buying 24 kg of sugar = 9 u + 24
9 u + 24 = 12 u
12 u - 9 u = 24
3 u = 24
1 u = 24 ÷ 3 = 8
Amount of sugar that Mrs Loo had at first
= 10 u
= 10 x 8
= 80 kg
Answer(s): 80 kg
