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Academics – Mathematics : 2014/JUL/04

Question

Q4. A keyway, of width 14 mm, is cut into a steel shaft, of radius 25 mm, along its entire length, as shown in Fig. Q4.

Calculate EACH of the following for the shaft:

(a) the maximum depth of the keyway; (8)

(b) the percentage of steel removed. (8)

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