A jar contained 4.9 ℓ more water than a watering can. After some water was poured from the jar to the watering can, both the jar and the watering can had 6 ℓ of water each. How much water was there in the watering can at first?
|
Jar |
Watering Can |
Total |
Before |
1 u + 4.9 |
1 u |
12 |
Change |
- ? |
+ ? |
|
After |
6 |
6 |
12 |
Volume of water in the watering can = 1 u
Volume of water in the jar = 1 u + 4.9
Total volume of water
= 1 u + 1 u + 4.9
= 2 u + 4.9
Total volume of water
= 2 x 6
= 12 ℓ
When water is poured from the jar to the watering can, the total volume remains unchanged.
2 u + 4.9 = 12
2 u = 12 - 4.9
2 u = 7.1
1 u = 7.1 ÷ 2 = 3.55
Volume of water in the watering can at first = 3.55 ℓ
Answer(s): 3.55 ℓ