For determining the support reactions at A and B of a three hinged arch, points B and Care joined 

and produced to intersect the load line at D and a line parallel to the load line through A at D'. 

Distances AD, DD' and AD' when measured were 4 cm, 3 cm and 5 cm respectively. The angle 

between the reactions at A and B is 

(A) 30° 

(B) 45° 

(C) 60° 

(D) 90

1 Answer

Answer :

(D) 90

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