INTRODUCTION SURFACE AREA OF CONE AND Q NO. 1

Volume & Surface area Ex : 13.1

A right circular imaginary cone is shown in figure A, B, and C are the points in the plane containing the base of the cone, while D is the point at the vertex of the cone. If phi_A, phi_B, phi_C and phi_D represent the fulx through the curved surface of the cone when a point charge Q is at points A, B, C, and D. respectively. then.

The semi-vertical angle of a cone is 45^(@) . If the height of the cone is 20.025, then its approximate laternal surface area, is

The volume of a right circular cone is 9856 cm^3 . If the diameter of the base is 28 cm. Find (i) height of the cone (ii) slant height of the cone (iii) curved surface area of the cone

A charge Q is enclosed by a Gaussian surface. If surface area is doubled and charge Q is tripled then the outward electric flux will

A buoy is made in the form of hemisphere surmounted by a right cone whose circular base coincides with the plane surface of hemisphere. The radius of the base of the cone is 3.5 metres and its volume is two-third of the hemisphere. Calculate the height of the cone and the surface area of the buoy, correct to two places of decimal.

Given the area of the retina 1. Macula 2. Fovea centralis 3. Optic disc 4. Periphery of the retina Choose the arrangement that lists the areas according to the density of cones, starting with the area that has highest density of cones

A toy is in the form of a cone surmounted on a hemisphere. The diameter of the base and the height of the cone are 6 cm and 4 cm, respectively. Determine the surface area of the toy. (Use pi=3. 14 )

The height and base radius of a metallic cone are 216 cm and 16 cm respectively.It melted and recast into a sphere .Find the surface area of the spere.

A toy is in the form of a cone mounted on a hemisphere of same radius 7 cm. If the total height of the toy is 31cm, find the total surface area.