A pot contained 3.1 ℓ more water than a can. After some water was poured from the pot to the can, both the pot and the can had 7 ℓ of water each. How much water was there in the can at first?
| |
Pot |
Can |
Total |
| Before |
1 u + 3.1 |
1 u |
14 |
| Change |
- ? |
+ ? |
|
| After |
7 |
7 |
14 |
Volume of water in the can = 1 u
Volume of water in the pot = 1 u + 3.1
Total volume of water
= 1 u + 1 u + 3.1
= 2 u + 3.1
Total volume of water
= 2 x 7
= 14 ℓ
When water is poured from the pot to the can, the total volume remains unchanged.
2 u + 3.1 = 14
2 u = 14 - 3.1
2 u = 10.9
1 u = 10.9 ÷ 2 = 5.45
Volume of water in the can at first = 5.45 ℓ
Answer(s): 5.45 ℓ
