The total surface area of a hollow cylinder, which is open from the sides is $3575{\mathrm{cm}}^2 ;$are  of its base ring is $357.5{\mathrm{cm}}^2$ and its height is $14\mathrm{cm}.$ Find the thickness of the cylinder.

The given figure shows a solid formed of a solid cube of side $40\mathrm{cm}$ and a solid cylinder of radius $20\mathrm{cm}$ and height $50\mathrm{cm}$ attached to the cube as shown.

Find the volume and the total surface area of the whole solid.[take $\mathrm{\pi }=3.14$ ]

Two right circular solid cylinders have radii in the ratio $3:5$ and heights in the ratio $2:3.$ Find the ratio between their;

Curved surface areas.

Two right circular solid cylinders have radii in the ratio $3:5$ and heights in the ratio $2:3.$ Find the ratio between their ;

Volumes