A toy is in the shape of a cylinder surmounted by a hemisphere. The height of the toy is $25 \mathrm{cm}$. Find the total surface area of the toy if its common diameter is $12 \mathrm{cm}$.

A jewel box is in the shape of a cuboid of dimensions $30 \mathrm{cm}\times 15 \mathrm{cm}\times 10 \mathrm{cm}$ surmounted by a half part of a cylinder as shown in the figure. Find the volume and T.S.A. of the box.

A cone of height $24 \mathrm{cm}$ is made up of modeling clay. A child reshapes it in the form of a cylinder of same radius as cone. Find the height of the cylinder.