The vertical reaction for the arch is
A
$$\frac{{{\text{Wa}}}}{{2l}}$$
B
$$\frac{{{\text{W}}l}}{{\text{a}}}$$
C
$$\frac{{{\text{Wa}}}}{l}$$
D
$$\frac{{{\text{W}}{{\text{a}}^2}}}{{2l}}$$
Correct Answer: $$\frac{{{\text{Wa}}}}{{2l}}$$
