Let radius of the semi-circle = $$r$$ cm => Area = $$frac{1}{2} imespi r^2$$=1925$$ => $$frac{1}{2} imesfrac{22}{7} imes r^2=1925$$ => $$r^2=1925 imesfrac{7}{11}=1225$$ => $$r=sqrt{1225}=35$$ cm $$ herefore$$ Perimeter = $$pi r+2r$$ = $$(frac{22}{7} imes35)+(2 imes35)$$ = $$110+70=180$$ cm => Ans - (D)