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UPSC Civil Service Exam Questions

Q1:
In the cantilever truss shown in the given figure, the reaction at A is

A 10 t

B 20 t

C 30 t

D 40 t

ANS:C - 30 t

Take left-hand support as B.

Ra + Rb = 0.
Taking moment at the point A is 0.
Rb*5 + 10 *15 = 0.
Rb = -30.
Hence Ra is +30.



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