Pail S has five times as much water as Pail R. If Justin adds 0.7 ℓ of water to Pail S and 2.1 ℓ of water to Pail R, both pails will have the same volume of water. Find the volume of water in Pail S at first.
| |
R |
S |
| Before |
1 u |
5 u |
| Change |
+ 2.1 |
+ 0.7 |
| After |
1 u + 2.1 |
5 u + 0.7 |
Both pails have the same volume of water in the end.
5 u + 0.7 = 1 u + 2.1
5 u - 1 u = 2.1 - 0.7
4 u = 1.4
1 u = 1.4 ÷ 4 = 0.35
Volume of water in Pail S at first
= 5 u
= 5 x 0.35
= 1.75 ℓ
Answer(s): 1.75 ℓ
