Lateral Area Formula

The surface area (lateral) of a figure is the area of the non-base faces only. The Total surface area of a cuboid is given by 2 (length . breadth + breadth . height + height . length) = 2 × (lb + bh + hl). The total surface area of a cube is given by $6\times side^{2}$. The surface area (lateral) of a cuboid of is given by 2(length + breadth) × height. Similarly, the surface area of a cube (lateral) of side a is equal to $6\times side^{2}$.

The Curved Surface Area of a Cylinder is given by 2 × π × r × h where, r = base radius, and h = height of the cylinder. The total surface area of a Cylinder is given by 2πr × (r + h).

The Curved Surface Area of a Cone = π × r × l where, r = base radius, and l = slant height. The Slant height (l) = $\sqrt{r^{2}+h^{2}}$ where, h = height of cone. If the base of the cone is to be closed, then the total Surface Area of a Cone is given by $= \pi rl + \pi r_{2} = \pi r(l + r)$

The Surface Area of a Sphere is given by $4\pi r^{2}$ where r is the radius of the sphere. Hence, the Curved Surface Area (CSA) of a Hemisphere is given by $2\pi r^{2}$ where r is the radius of the sphere of which the hemisphere is a part. The total surface area (TSA) of a Hemisphere is given by 3π.

The Volume of a Cuboid is given by (area of base × height) i.e. height × (length × breadth). The volume of a Cube is given by $edge^{3}$. The Volume of a Cylinder is given by $\pi r^{2} h$ where r = radius of base and h = given height of the cylinder. The Volume of a Cone is given by $\frac{1}{3}\pi r^{2}h$ where r = base radius and h = height of the cone. The Volume of a Sphere is given by $\frac{4}{3}\pi r^{3}$ where r is the radius of the sphere.

Practise This Question

Bacteria were around when dinosaurs came into existence 231 million years ago. True or False?