question_answer

The base of a pyramid is an n-sided regular polygon of area 720\[\mathbf{c}{{\mathbf{m}}^{\mathbf{2}}}\]the total surface area of the pyramid is 1800\[\mathbf{c}{{\mathbf{m}}^{\mathbf{2}}}\]. Each of the pyramid has an area of 60\[\mathbf{c}{{\mathbf{m}}^{\mathbf{2}}}\]. Find the value of n.

A) 36                    

B) 26          

C) 18          

D) 22

E) None of these