Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 23 (Q.No. 2)
In a plane truss, if 'M' is the number of members, 'R' is the number of reactions and 'J' is the number of joints, then for this truss to be determinate
J = M + R
J = 2M + R
3J = M + 2R
2J = M + R
Answer: Option
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