A container contained 3.7 ℓ more water than a pail. After some water was poured from the container to the pail, both the container and the pail had 4 ℓ of water each. How much water was there in the pail at first?
|
Container |
Pail |
Total |
Before |
1 u + 3.7 |
1 u |
8 |
Change |
- ? |
+ ? |
|
After |
4 |
4 |
8 |
Volume of water in the pail = 1 u
Volume of water in the container = 1 u + 3.7
Total volume of water
= 1 u + 1 u + 3.7
= 2 u + 3.7
Total volume of water
= 2 x 4
= 8 ℓ
When water is poured from the container to the pail, the total volume remains unchanged.
2 u + 3.7 = 8
2 u = 8 - 3.7
2 u = 4.3
1 u = 4.3 ÷ 2 = 2.15
Volume of water in the pail at first = 2.15 ℓ
Answer(s): 2.15 ℓ