Lateral surface area of a cube $= \ldots \ldots \ldots$

The radius and slant height of a cone are in the ratio of $2:7$. If its curved surface area is $704 \, cm^2$,find its radius $(r)$,slant height $(l)$,and height $(h)$.

Find the surface area of a sphere of diameter $3.5\,m$ (in $m^2$).

The ratio of radii of two cylinders with equal height is $4:5$. What is the ratio of their volumes?

$A$ shopkeeper has one spherical laddoo of radius $5 \, cm$. With the same amount of material,how many laddoos of radius $2.5 \, cm$ can be made?

The ratio of the curved surface area and the total surface area of a cylinder is $2: 5$. Find the ratio of the radius and height of the cylinder.