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Two persons A and B are 40 m apart. Tria...

Two persons A and B are 40 m apart. Triangulation method was used to measure the distance obtained is place C and the person A. The triangle obtained is as shown. The triangle is drawn from the positions of A and B and the vertices P, Q and R correspond to the position of A, B and the palce C, respectively. Determine the distance between the person A and the place C.

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