The curved surfaec area (c) of a cone is `pirl`, where `l=sqrt(r^(2)+h^(2))`, express h in terms of c and r.

The curved surface area of frustum of a cone is pi//(r_(1) +r_(2)) , where l = sqrt(h^(2) +(r_(1) + r_(2))^(2)),r_(1) and r_(2) are the radii of two ends of the frustum and h s the vertical height.

The curved surface area of frustum of a cone is pi//(r_(1) +r_(2)) , where l = sqrt(h^(2) +(r_(1) + r_(2))^(2)),r_(1) and r_(2) are the radii of two ends of the frustum and h s the vertical height.

The curved surface area of a cone of base radius r and height h is_______.

Lateral surface area of a right circular cone =pirl , where ‘l’ is ……….

If 2r=h+sqrt(r^(2)+h^(2)) the value of r:h is (r,h!=0)