SOLUTION: Ana has a container of disinfectant concentrate and needs to dilute it to make up 5 litres of solution. If the ratio is one part disinfectant to every hundred parts of water, how m

Question 935672: Ana has a container of disinfectant concentrate and needs to dilute it to make up 5 litres of solution. If the ratio is one part disinfectant to every hundred parts of water, how many millilitres of concentrate will Ana need to use?

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
= ( liters disinfectant ) / ( water )
liters = disinfectant + water
-------------------------------
Liters of water = 5 - liters of disinfectant
Let = liters of disinfectant
-------------------------------

Multiply both sides by

liters
Ana needs 49.5 ml of concentrate
---------------------
check:

close enough

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