A bottle contained 4.5 ℓ more water than a watering can. After some water was poured from the bottle to the watering can, both the bottle and the watering can had 4 ℓ of water each. How much water was there in the watering can at first?
|
Bottle |
Watering Can |
Total |
Before |
1 u + 4.5 |
1 u |
8 |
Change |
- ? |
+ ? |
|
After |
4 |
4 |
8 |
Volume of water in the watering can = 1 u
Volume of water in the bottle = 1 u + 4.5
Total volume of water
= 1 u + 1 u + 4.5
= 2 u + 4.5
Total volume of water
= 2 x 4
= 8 ℓ
When water is poured from the bottle to the watering can, the total volume remains unchanged.
2 u + 4.5 = 8
2 u = 8 - 4.5
2 u = 3.5
1 u = 3.5 ÷ 2 = 1.75
Volume of water in the watering can at first = 1.75 ℓ
Answer(s): 1.75 ℓ