A barrel contained 3.7 ℓ more water than a watering can. After some water was poured from the barrel to the watering can, both the barrel and the watering can had 5 ℓ of water each. How much water was there in the watering can at first?
| |
Barrel |
Watering Can |
Total |
| Before |
1 u + 3.7 |
1 u |
10 |
| Change |
- ? |
+ ? |
|
| After |
5 |
5 |
10 |
Volume of water in the watering can = 1 u
Volume of water in the barrel = 1 u + 3.7
Total volume of water
= 1 u + 1 u + 3.7
= 2 u + 3.7
Total volume of water
= 2 x 5
= 10 ℓ
When water is poured from the barrel to the watering can, the total volume remains unchanged.
2 u + 3.7 = 10
2 u = 10 - 3.7
2 u = 6.3
1 u = 6.3 ÷ 2 = 3.15
Volume of water in the watering can at first = 3.15 ℓ
Answer(s): 3.15 ℓ
