A closed cylindrical tank of height 1.4 m. and radius of the base is 56 cm. is made up of a thick metal sheet. How much metal sheet is required (Express in square meters)

A tent is cylindrical to a height of 4.8 m .and conical above it. The radius of the base is 4.5 m. and total height of the tent is 10.8 m . Find the canvas required for the tent in square meters.

A cone of height 16 cm and radius of base 4 cm is made up modeling clay. A child reshapes it into a sphere. Find the radius of the sphere.

What length of tarpaulin 3 m wide will be required to make a conical tent of height 8 m and base radius 6 m ? Assume that extra length of material that will be required for stitching margins and wastage in cutting is approximately 20 cm (use pi =3.14 ) [Note : Take 20 cm as 0.6 m^2 ]

A cylindrical box of radius 7m, height of 5 m is to be made. Determine the area of the sheet required for making the closed box and also find the cost of the sheet required, if it costs Rs. 30 per 1 m^2 .

If a cylindrical vessel of given volume V with non lid on the top is to be made from a sheet of metal, then the radius (r) and height (h) of the vessel so that the metal sheet used is minimum is

A toy is in the form of right circular cone whose base radius 5 cm and height is 12 cm. Find the area of sheet required to make 10 such toys.

A joker's cap is in the form of right circular cone whose base radius is 7 cm and height is 24 cm. Find the area of the sheet required to make 10 such caps.