Answer:
129 square foot
Step-by-step explanation:
Step 1: Convert height of the door to inches
Height of the door = 10 feet 8 inches
1 feet = 12 inches
10 feet = y inches
Cross Multiply
y = 120 inches
Height of door in inches = 120 + 8 =128 inches
Step 2: Find the surface area of one side of the door
Surface area = length x width
length = 128 inches
width = 145 inches
Surface area = 128 x 145
Surface area = 18560 inches
Step 3: Convert surface area from inches to square foot
Surface area = 18560 inches
1 square foot = 144 inches
y = 18560 inches
Cross multiply
144y = 18560
y = 18560/144
y = 128.89 rounded off to 129 square foot.
Therefore, you should report 129 square foot surface area to the hardware store.
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