Let radius of base of cylinder = $$r$$ cm and height = $$h$$ cm Circumference of base = $$2 pi r = 44$$ => $$2 imes frac{22}{7} imes r = 44$$ => $$r = 44 imes frac{7}{44} = 7$$ cm Curved surface area of cylinder = $$2 pi r h = 528$$ => $$2 imes frac{22}{7} imes 7 imes h = 528$$ => $$h = frac{528}{44} = 12$$ cm => Ans - (A)