A toy is in the form of a cone of radius 3.5 cm mounted on a hemisphere of the same radius. The total height of the toy is 15.5 cm. Find the surface area of the toy $\left[\mathrm{\pi }=3.14\right]$

Find the total surface area of a hemisphere of diameter $10 cm$.

The curved surface area of a hemisphere with radius $7 \mathrm{cm}$ is: 

(Take$\mathrm{\pi }=\frac{22}{7}$)

The surface area of a sphere of radius $7 cm$ is

(Take $\pi =\frac{22}{7}$)

The radius of a semi-sphere is $7$ cm, find the total surface area of it.

If the volume of a sphere is $4851 {\mathrm{cm}}^3$, then its surface area (in ${\mathrm{cm}}^2$) is: (Take $\mathrm{\pi }=\frac{22}{7}$)