Question

A weight of 200 N is supported by two strings as shown in figurebelow. Find the torsions of each string.

Answer 1

Hiya,
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Try using Lami's theorem: A/sin x = B/sin y = C/sin z

From the given diagram, I can see there are three forces acting here.
1) Weight of the body 2) Tension 1 (30*) 3) Tension 2 (60*)
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So Substitute in the formula:-

And see the pic i have attached below. 
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Enjoy:)