The cylinderical tank shown in the diagram above is to be painted. The tank is open at the top, and the bottom does not need to be painted. Only the outside needs to be painted. Each can of paint covers 500 square feet. What is the least number of cans of paint that must be purchased to complete the job?

A grain silo, shown below, is in the shape of cylinder with a half sphere on top . The radius of the base of the cylinder is 10 feet , and the height of the cylindrical part is 60 feet, as marked The farmer who owns the silo plans to apply a coat of paint to the cylindrical exterior . This does not include the spherical top . A formula for the lateral surface area S of a cylinder with radius r and height h is S=2pirh . if one can of paint covers 300 square feet of surface, what is the least number of cans that the farmer must buy to complete the job ?

Dimensions of cylindrical overhead tank are, radius = 6m and height = 7m. If it is to be painted to save it from corrosion, how much area needs to be painted?

Half of a large cylindrical tank open at the top is filled with water and identical heavy spherical balls are to be dropped into the tank without spilling water out. If the radius and the height of the tank are equal and each is four times the radius of a ball, what is the maximum number of balls that can be dropped?

Walls (excluding their roofs and floors) of 5 identical rooms having length, breadth and height 6 m, 4 m and 2.5 m respectively are to be painted. Paints are available only in cans of 1 L and one litre of paint can be used for painting 20 square metres. What is the number of cans required for painting ?

Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth and height of 15m, 10m and 7m respectively. From each can of the paint 100m^2 of area is painted. How many cans of paint will she need to paint the room?

Daniel is painting the walls and ceiling of a cuboidal hall with length,breadth and height of 15 m,10 m and 7 m respectively.From each can of paint 100 m^2 of area is painted.How many cans of paint will she need to paint the room?

Daniel is painting the walls and ceiling of a cuboidal hall with length,breadth and height of 15m,10m and 7m respectively.From each can of paint 100 m^2 of area is painted.How many cans of paint will she need to paint the room?