Find the area of metal sheet required in making a closed hollow cone of base radius 7cm and height 24cm.

Find the minimum length in cm and correct to nearest whole number of the thin metal sheet required to make a hollow and closed cylindrical box of diameter 20 cm and height 35 cm. Given that the width of the metal sheet is 1 m. Also, find the cost of the sheet at the rate of Rs 56 per sq m. Find the area of metal sheet required, if 10% of it is wasted in cutting, overlapping, etc.

Find the height of a cone of radius 5 cm and slant height 13 cm.

Find the height of a cone of radius 5 cm and slant height 13 cm.

Find the area of the cardboard required to make a closed box of length 25cm, 0.5m and height 15cm.

Find the curved surface area of a cone with base radius 5.25cm and slant height 10cm.

A hollow sphere of internal and external radii 6 cm and 8 cm respectively is melted and recast into small cones of base radius 2 cm and height 8 cm. Find the number of cones.

Find the area of canvas required for a conical tent of height 24m and base radius 7m.

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

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

An open metallic bucket is in the shape of the frustum of the cone. If the diameters of the two circular ends of the bucket are 45 cm and 25 cm and the vertical height of the bucket is 24cm, find the area of the metallic sheet used to make the bucket. Also find the volume of water it an hold. (Use pi=22/7 )