The edge of a cube is $35\, cm$. Find the total surface area of the cube (in $cm^2$).

The curved surface area of a cylinder is $550 \, cm^2$. If its height is $50 \, cm$,find its diameter in $cm$.

$A$ right triangle with sides $6 \, cm$,$8 \, cm$,and $10 \, cm$ is revolved about the side $8 \, cm$. Find the curved surface area of the solid so formed (in $cm^2$). (in $, cm^2$)

The lateral surface area of a cube is $256 \, m^2$. The volume of the cube is (in $m^3$)

Find the surface area of a sphere of radius $50\, cm$ $(\pi = 3.14)$ (in $cm^2$).

Find the curved surface area and the total surface area of a hemisphere with a radius of $2.1 \, m$.