In order to conserve energy,it is decided to increase the R-value of an outside wall from by adding an inexpensive layer of sheathing on the inside of the wall which has an R-value of
.When the temperature difference between the inside and outside is 20 C,by what percentage is the rate of energy transfer through the wall reduced by this added insulation?
A) 37%
B) 58%
C) 63%
D) This cannot be found without also knowing the area of the wall.
Correct Answer:
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