Last year, the average American used 167 disposable water bottles (16.9 oz or 0.132 gallons). If the cost of 1 gallon of tap water in Philadelphia is approximately 7 cents, how much money could be saved by drinking tap water if we assume the cost of 1 bottle of water is $1.00?

The total money saved by consuming tap water is $165.46 and this can be determined by using the unitary method.

Given :

The unitary method can be used to determine the amount of money is saved by drinking tap water.

If the cost of one bottle is $1 then the cost of 167 bottles will be:

= $167

Now, if one bottle contains 0.132 gallons of water then 167 bottles contain:

= 22.04 gallons  

The cost of one gallon of tap water = $0.07

Then the cost of 22.04 gallons of tap water will be:

= $1.54

Therefore, the total money saved by consuming the tap water will be:

= 167 - 1.54

= $165.46

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The money that could be saved by drinking tap water is $165.46.

Step-by-step explanation:

Given:

Cost of 1 bottle of water = $1.00

Number of bottles consumed = 167

Volume of water used in 1 bottle = 0.132 gallons

So, volume of water used in 167 bottles = 167 × 0.132 = 22.04 gallons

Cost of 1 gallon of tap water = 7 cents = $0.07

In order to determine the money saved using tap water, we first find the cost of 167 bottles.

Using unitary method,

1 bottle cost = $1.00

167 bottles cost = Number of bottles × Cost of 1 bottle

                          = 167 × $1.00 = $167.00

Now, 167 dollars is spent for consuming 22.04 gallons of water.

Now, cost of 1 gallon of tap water = $0.07

So, cost of 22.04 gallons of tap water = 22.04 × 0.07 = $1.54

Therefore, the money saved by drinking tap water is given as:

Money saved = Money spent in bottles for 22.04 gallons - Money spent in tap water for the same volume

Money saved = $167.00 - $1.54 = $165.46

Hence, the money that could be saved by drinking tap water is $165.46.

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