A bell tent consists of a conical portion above a cylindrical portion near the ground. For a given volume and a circular base of a given radius, the amount of the canvas used is minimum when the semi vertical angle of the cone is :

A bell tent consists of a conical portion above a cylindrical portion near the ground. For a given volume and a circular base of a given radius, the amount of the canvas used is a minimum when the semi-vertical angle of the cone is cos^(-1)2/3 (b) sin^(-1)2/3 cos^(-1)1/3 (d) none of these

A bell tent consists of a conical portion above a cylindrical portion near the ground. For a given volume and a circular base of a given radius, the amount of the canvas used is a minimum when the semi-vertical angle of the cone is cos^(-1)2/3 (b) sin^(-1)2/3 cos^(-1)1/3 (d) none of these

A bell tent consists of a conical portion above a cylindrical portion near the ground. For a given volume and a circular base of a given radius, the amount of the canvas used is a minimum when the semi-vertical angle of the cone is (a) cos^(-1)2/3 (b) sin^(-1)2/3 (c) cos^(-1)1/3 (d) none of these

A bell tent consists of a conical portion above a cylindrical portion near the ground.For a given volume and a circular base of a given radius,the amount of the canvas used is a minimum when the semi-vertical angle of the cone is cos^(-1)(2)/(3)(b)sin^(-1)(2)/(3)cos^(-1)(1)/(3)(d) none of these

The total surface area of a right circular cone is given . Show that the volume of the cone is maximum when the semi-vertical angle is sin^(-1)(1/3) .

Prove that a conical tent of given capacity will require the least amount of canvas when the height is sqrt(2) xx the radius of the base.

Prove that , a conical tent of given capacity will require the least amount of canvas , when the height is sqrt(2) times the radius of the base .

Prove that a conical tent of given capacity will require the least amount of canvas when the height is sqrt(2) times the radius of the base.