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Discover ratio of the torsional strengths:
A hollow shaft of inner diameter is 1/2 × the outer diameter & a solid shaft of diameter is the external diameter of the hollow shaft. Discover ratio of the torsional strengths. Both the shafts are made with alike material.
Solution
Hollow Shaft
d i = do /2
R = do /2
Solid Shaft
R = do / 2
T =τ . (J/ R)
TH =τ JH/RH
TS =τ JS/RS
=15/16
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