The degree of static indeterminacy of a rigid-jointed space frame is
(A) m + r - 2j
(B) m + r - 3j
(C) 3m + r - 3j
(D) 6m + r - 6j
Where m, r and j have their usual meanings
(A) m + r - 2j
(B) m + r - 3j
(C) 3m + r - 3j
(D) 6m + r - 6j
Where m, r and j have their usual meanings