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| Math Central | Quandaries & Queries |
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Question from Ashutosh, a student: A sheet of corrugated iron has corrugations based on the arc of a circle of radius of 3 cm and a central angle of 180 degrees. How many corrugations are formed when a flat sheet of steel 1 metre wide is bent to form a sheet of corrugated iron? |
Ashutosh,
Each corrugation is one convex arc and one concave arc. Considered together, this is the same as the circumference as one circle.
What is the circumference of a circle with radius 3 cm?
How many such circles can you make with 1 m of material?
Cheers,
Stephen La Rocque.
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