For determining the support reactions at A and B of a three hinged arch, points B and C are 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°-D-90°

Question

For determining the support reactions at A and B of a three hinged arch, points B and C are joined and produced to intersect the load line at D and a line parallel to the load line through A at D&#39;. Distances AD, DD&#39; and AD&#39; when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is-A-30&deg;B-45&deg;C-60&deg;D-90&deg;-D-90&deg;

APTITUDE CRACK · Accepted Answer

D 90&deg; It is the Right angle triangle theory for arch.

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