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A steel transmission shaft is 510mm long and 50mm external diameter, parts of its length is bored to a diameter of 25mm and bored

A steel transmission shaft is 510mm long and 50mm external diameter, parts of its length is bored to a diameter of 25mm and bored for the rest to 38mm. a) Find the maximum power that may be transmitted at a speed of 210 revolutions per minute if the shear stress is not to exceed 70MPa. b) If the angle of twist in the length of 25mm bore is equal to that of the diameter of 38mm bore. Find the length of the latter diameter.

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