Curved surface area of a cylinder is 528 sq cm. If circumference of its base is 44 cm, find the height of the cylinder? In a triangle the length of the side opposite the right angle is 9√3 cm, what is the length of the side opposite to the angle which measures 30 degree? In ΔDEF, G and H are points on side DE and DF respectively. GH is parallel to EF. If G divides DE in the ratio 1:3 and HF is 7.2 cm, find length of DF If the radius of a circle is increased by 15% its area increases by _________