A Polygon Cross-Sectional Duct Is to Be Exposed and Painted

question 181

Multiple Choice

A polygon cross-sectional duct is to be exposed and painted. It is to be attached to a same-shaped, but smaller duct. If the dimensions of the ducts are AB = 18 in., DE = 30 in., A'B' = 6 in., find D'E'?

• A) 10 in.
• B) 20 in.
• C) 2 in.
• D) 30 in.
• E) 4 in.

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