# 3.   In a huge park, people are concentrated at three points (see Fig.):              A : where there are different slides and swings for children,              B : near which a man-made lake is situated,              C : which is near to a large parking and exit.              Where should an icecream parlour be set up so that maximum number of persons can approach it?              (Hint : The parlour should be equidistant from A, B and C)

Thus we need to find the circumcenter of the $\Delta ABC$
Hence the required point can be found out by drawing perpendicular bisectors of $\Delta ABC$.