Find the surface area of a sphere of radius $1.25 \, m$ $(\pi = 3.14)$ (in $m^2$).

$A$ hemispherical metallic bowl is made of steel,$0.2 \, cm$ thick. The inner radius of the bowl is $4 \, cm$. Find the outer curved surface area of the bowl (in $cm^2$).

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

Total surface area of a hemisphere $= \dots$

The surface area of a sphere and the curved surface area of a hemisphere are equal. Find the ratio of their radii.

Find the surface area of a sphere of radius $7 \, cm$. (in $, cm^{2}$)