Math Problem Statement
The figure shows a section of a steel pipe of length 12cm. the internal and external radii of the pipe are 2.1cm and 2.5cm respectively. Question: show that the area of the cross section of the pipe is 1.84 π cm2
Solution
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Math Problem Analysis
Mathematical Concepts
Geometry
Circle Area
Annulus
Formulas
Area of a circle: A = πr^2
Area of an annulus: A = π(R^2 - r^2)
Theorems
-
Suitable Grade Level
High School
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