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1. What is the thikness of a pipe that has an outer diameter of 2.5 inches and inner diameter of 2.1 inches?
- A. 0.2 inches
- B. 0.2 inches
- C. 0.2 inches
- D. 0.2 inches
Answer: Option A
Explanation:
Consider going across the width of the pipe:
Outer diameter = Thickness + Inner diameter + Thickness
so 2*Thickness = Outer diameter - Inner diameter = 2.5 - 2.1 = 0.4 inches
and therefore, Thickness = 0.2 inches.
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