SOLUTION: Public swimming pools require 3 parts chlorine liquid and 2 parts salt water to every 100 parts water to kill bacteria. How much chlorine liquid is required in a 4000 L pool? I

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Question 708174: Public swimming pools require 3 parts chlorine liquid and 2 parts salt water to every 100 parts water to kill bacteria. How much chlorine liquid is required in a 4000 L pool?
I have no clue where to even start.
Can you help me?
Thanks

Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
That is a Proportion problem. The idea is compare ratios.

The description tells about parts of chlorine liquid and parts of salt water; but the question only deals with chlorine liquid. The pool requires 3 parts of chlorine liquid to 100 parts of pool water.

The ratio to use is 3:100, for parts chlorine liquid to parts pool water. You can and usually will also use this as %283%2F100%29,
for (parts chlorine liquid)/(parts water).

Now for 4000 Liter pool, how much chlorine? Trace back in meaning. If the pool were 100 Liters, then how much chlorine liquid would it need? We must assume volume here, so the 3/100 ratio is 3 liters chlorine liquid to 100 liters pool water. Well how many times larger is 4000 liters?

NUMBERS IN EQUATION
3%2F100=+V%2F4000
Find V.

%283%2F100%29%2A4000=%28V%2F4000%29%2A4000
highlight%28120=V%29, Liters.