After using
49 of her curry powder, Mrs Ong bought another 30 kg of curry powder. As a result, Mrs Ong now has
109 as much curry powder as what she had at first. How many kilograms of curry powder did Mrs Ong have at first?
| |
Curry Powder |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
5 u |
|
| Change 2 |
+ 30 |
|
| After 2 |
5 u + 30 |
10 u |
Fraction of curry powder left after using
49 of it
= 1 -
49 =
59 Amount of curry powder left after using some = 5 u
Amount of curry powder after buying 30 kg of curry powder = 5 u + 30
5 u + 30 = 10 u
10 u - 5 u = 30
5 u = 30
1 u = 30 ÷ 5 = 6
Amount of curry powder that Mrs Ong had at first
= 9 u
= 9 x 6
= 54 kg
Answer(s): 54 kg
