Shop D had 70 kg of flour and Shop E had 150 kg of flour. After both shops sold an equal amount of flour, Shop D had
37 as much flour as Shop E. How much flour did both shops sell?
| |
Shop D |
Shop E |
Difference |
| Before |
70 |
150 |
80 |
| Change |
- ? |
- ? |
|
| After |
3 u |
7 u |
4 u |
The difference between the amount of flour at first and in the end remains unchanged.
Difference in the mass of flour in the end
= 7 u - 3 u
= 4 u
4 u = 80
1 u = 80 ÷ 4 = 20
Mass of flour in Shop D in the end
= 3 u
= 3 x 20
= 60 kg
Mass of flour that each shop sold
= 70 - 60
= 10 kg
Amount of flour that both shops sold
= 2 x 10
= 20 kg
Answer(s): 20 kg
