RV-07-001 · Fraction mixture and a target concentration
A drink contains concentrate by volume. There are 770 ml of this drink. Water is added until concentrate makes up of the mixture. Work out the amount of water added. Give your answer in litres.
Fractions & Unchanged Quantity in a Mixture
Booklet p. 18 & p. 19
Method
1) Find volume of concentrate (remains constant when water is added!)
2) Multiply concentrate volume by new denominator for final volume
3) Subtract original volume and ÷ 1000
Worked Example (RV-07-001)
1)
Concentrate volume = 110 ml.
2)
The concentrate volume remains unchanged.
3)
Final volume = 110 × 11 = 1210 ml.
4)
Added water = 440 ml.
5)
litres
Ans =
litres