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