After using
15 of her chicken powder, Mrs Yong bought another 30 kg of chicken powder. As a result, Mrs Yong now has
105 as much chicken powder as what she had at first. How many kilograms of chicken powder did Mrs Yong have at first?
| |
Chicken Powder |
Total |
| Before |
5 u |
5 u |
| Change 1 |
- 1 u |
|
| After 1 |
4 u |
|
| Change 2 |
+ 30 |
|
| After 2 |
4 u + 30 |
10 u |
Fraction of chicken powder left after using
15 of it
= 1 -
15 =
45 Amount of chicken powder left after using some = 4 u
Amount of chicken powder after buying 30 kg of chicken powder = 4 u + 30
4 u + 30 = 10 u
10 u - 4 u = 30
6 u = 30
1 u = 30 ÷ 6 = 5
Amount of chicken powder that Mrs Yong had at first
= 5 u
= 5 x 5
= 25 kg
Answer(s): 25 kg
