After using
14 of her chilli powder, Mrs Gan bought another 21 kg of chilli powder. As a result, Mrs Gan now has
64 as much chilli powder as what she had at first. How many kilograms of chilli powder did Mrs Gan have at first?
| |
Chilli Powder |
Total |
| Before |
4 u |
4 u |
| Change 1 |
- 1 u |
|
| After 1 |
3 u |
|
| Change 2 |
+ 21 |
|
| After 2 |
3 u + 21 |
6 u |
Fraction of chilli powder left after using
14 of it
= 1 -
14 =
34 Amount of chilli powder left after using some = 3 u
Amount of chilli powder after buying 21 kg of chilli powder = 3 u + 21
3 u + 21 = 6 u
6 u - 3 u = 21
3 u = 21
1 u = 21 ÷ 3 = 7
Amount of chilli powder that Mrs Gan had at first
= 4 u
= 4 x 7
= 28 kg
Answer(s): 28 kg
