From a solid cylinder whose height is $16 \mathrm{cm}$ and radius is $12 \mathrm{cm},$ a conical cavity of height $8 \mathrm{cm}$ and of base radius $6 \mathrm{cm}$ is hollowed out. Find the volume and total surface area of the remaining solid.

$\mathrm{A}$ circus tent is cylindrical to a height of $4 \mathrm{m}$ and conical above it. If its diameter is $105 \mathrm{m}$ and its slant height is $80 \mathrm{m},$ calculate the total area of canvas required. Also, find the total cost of canvas used at$\mathrm{Rs} 15$ per metre if the width is $1.5 \mathrm{m}.$

A circus tent is cylindrical to a height of $8 \mathrm{m}$ surmounted by a conical part. If total height of the tent is $13 \mathrm{m}$ and the diameter of its base is $24 \mathrm{m};$ calculate total surface area of the tent.
 

A circus tent is cylindrical to a height of $8 \mathrm{m}$ surmounted by a conical part. If total height of the tent is $13 \mathrm{m}$ and the diameter of its base is $24 \mathrm{m};$ calculate area of canvas, required to make this tent allowing $10\%$ of the canvas used for folds and stitching.

A wooden toy is in the shape of a cone mounted on a cylinder as shown alongside. If the height of the cone is $24 \mathrm{cm},$ the total height of the toy is $60 \mathrm{cm}$ and the radius of the base of the cone$=$ twice the radius of the base of the cylinder $= 10 \mathrm{cm};$ find the total surface area of the toy.$[\mathrm{Take} \mathrm{\pi } = 3.14]$