Suppose a house has 15 windows, and each window leaks heat out of the house at...
Suppose a house has 15 windows, and each window leaks heat out of the house at a cost of $86.9/year per window. How much would the homeowner save per year by replacing the old windows with new windows that triple the R-value of the windows?
Homework Answers
Given
The house owner paying $86.9 / year due to leakage of heat from each window.
The number of windows n = 15
now the owner replaced all the windows with new ones having Triple (three times) the R value
we know that the R values measures the resistance to the heat flow so the leakage of heat will be reduced by 3 times ,so that the cost also reduced by 3 times , means each window can save 1/3 of previous amount that is
each window can save (1/3)($86.9) = $ 28.9667 = $29
so the total saving is equal to the saving of each window * the number of windows
the homeowner can save per year is $29*15 = $435
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