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Sheet Metal Worker

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AVG. SALARY

$55,250

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EDUCATION

High school (GED) +

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JOB OUTLOOK

Stable

Real-Life Activities

Real-Life Math -- Solution

Complete your area calculations. Remember, the dimensions are 3 feet wide on top and bottom, 2 feet high on the sides, and 12.5 feet long.

area = length x width
area of the top = 3 feet x 12.5 feet = 37.5 sq. ft.
area of the side = 2 feet x 12.5 feet = 25 sq. ft.
area of the end = 2 feet x 3 feet = 6 sq. ft.

Now you've got the area for 1 top, 1 side and the end. Double the appropriate ones to get the area of the entire finished duct.

total area of top and bottom = 37.5 sq. ft. x 2 = 75 sq. ft.
total area of sides = 25 sq. ft. x 2 = 50 sq. ft.

Now, add up all your totals:

total area of the duct = 75 + 50 + 6 = 131 sq. ft.

Therefore, you will need 131 square feet of material to make this duct.