Question

A pipe has an outside diameter of 1.25 inches and an inside diameter of 0.75 inches. If Kelly hacksaws the pipe in two, what fraction of the pipe cross sectional area is sawn when the blade breaks through to the inside?
Ms. Sue
(1.25 - 0.75)/2 = 0.25

0.25/1.25 = 1/5

working backwards 3.25 0.75 1.25 3.75 what does that make

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