The radius and height of a cylindrical cistern are $70 \,cm$ and $1.5 \,m$ respectively. How many litres of water can it hold?

The diameter of a solid sphere is $14 \, cm$. Find its surface area in $cm^2$.

Find the curved surface area and the total surface area of a hemisphere with a radius of $17.5 \, cm$.

Find the volume of a sphere with radius $2.1 \, m$ (in $m^{3}$).

$A$ cylindrical tube open at both ends is made of an iron sheet which is $2 \, cm$ thick. If the outer diameter is $16 \, cm$ and its length is $100 \, cm$, find how many cubic centimeters of iron have been used in making the tube? (in $cm^3$)

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