SOLUTION: A rectangular light-switch plate is made according to the following dimensions. The length is 7 inches, and the width is 5.5 inches; a rectangular hole measuring 1.2 inches by 0.3
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Question 163979: A rectangular light-switch plate is made according to the following dimensions. The length is 7 inches, and the width is 5.5 inches; a rectangular hole measuring 1.2 inches by 0.3 inches is left in the center. (See diagram below) (a) How many square inches in area is the light-switch plate (the shaded region)? (b) If the cost to construct the plate is $4.27 per square inch, what is the construction cost? Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! Part a:
"area of the entire rectangle" - "area of hole" = "area of plate"
(7*5.5) - (1.2*0.3)
38.5 - 0.36
38.14 square inches
.
Part b:
38.14 * 4.27 = $162.86 (sounds a little expensive to me)
