The R- Value of a 1- In

question 56

Multiple Choice

The R- value of a 1- in.- thick extruded polystyrene board is 5.0. If the R- value of a 1- in.- thick brick wall is 0.2, how thick should the brick wall be to equal the R- value of 1- in.- thick extruded polystyrene?

• A)50 in.
• B)10 in.
• C)5 in.
• D)2.5 in.
• E)None of the above

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