After using
27 of her chilli powder, Mrs Chua bought another 30 kg of chilli powder. As a result, Mrs Chua now has
87 as much chilli powder as what she had at first. How many kilograms of chilli powder did Mrs Chua have at first?
| |
Chilli Powder |
Total |
| Before |
7 u |
7 u |
| Change 1 |
- 1 u |
|
| After 1 |
5 u |
|
| Change 2 |
+ 30 |
|
| After 2 |
5 u + 30 |
8 u |
Fraction of chilli powder left after using
27 of it
= 1 -
27 =
57 Amount of chilli powder left after using some = 5 u
Amount of chilli powder after buying 30 kg of chilli powder = 5 u + 30
5 u + 30 = 8 u
8 u - 5 u = 30
3 u = 30
1 u = 30 ÷ 3 = 10
Amount of chilli powder that Mrs Chua had at first
= 7 u
= 7 x 10
= 70 kg
Answer(s): 70 kg
