How to calculate the cost of bottled water on a per cubic meter basis?

Question

I'm trying to answer this question:

Water delivered from a public supply in western Michigan costs $0.45 per cubic meter.  A 0.5 L bottle of water purchased from a dispensing machine costs $1.00.  What is the cost of the bottled water on a per cubic meter basis?

The Answer is:  $2000 m^(-3)

I tried calculating by getting that one 0.5L bottle is 0.0005 cubic meters ; then taking 0.0005 * $0.45 and got $2.25 x 10^(-4)

How do i calculate it to get the correct answer of $2000 m^(-3) ?

thanks

billrussell42 · Accepted Answer

$1 / 0.5 L x 1000 L / m³ = $2000 per m³

The $0.45 number is not relevant. 

.

Brian G · Answer

There are 1000 liters in a cubic meter.  At $2 per liter, it costs $2000 to buy a cubic meter in bottles.  It costs only $0.45 to buy it in bulk from the tap.  Since it is the very same thing, you are wasting $1,999.55 if you buy it in bottles.  This is also the gross profit realized by the dispensing machine company, because they are just filtering ordinary tap water.

Anonymous · Answer

1 liter is about 1,000 cm^3. based on an obsolete definition of Volume, density of water as 1 gm / cm^3 and 1 liter should weigh 1 Kilogram

a cubic Meter is (100 cm ) cubed or 1,000,000 cc

ok I agree 1,000 l = 1 m^3

dina · Answer

?? You can't. Without knowing the ratio of cement to other ingredients, the number is a guess.

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How to calculate the cost of bottled water on a per cubic meter basis?

4 Answers