1. Modulus of rigidity G=(R^4) T/L where R is the radius, T- theta the angle of twist and L the length
a) Determine the approximate percentage error in G when R is increased by
2%, T is reduced by 5% and L is increased by 4%
b) Solve a) by another method.

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can i ask why you substitute 1.02,1.05 and 1.04 inside the variable and minus with one.

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