Try to find the total surface area as the vessel is closed.

Put all the given values in the formula and then try to work out the solution using inverse operation .

Find the volume of hollow part and external part first and then take away.

Try to find the total surface area as the vessel is closed.

Try to find the area covered in one revolution.

How can we find the area of sheet required ? Notice that the tank is open from one side .

Try to find out the curved surface area as excluding the bases.

Use the formula and calculate the value of total surface area .

First find out the value of radius and then find the curved surface area and total surface area .

Try to calculate the volume of the soil so dug out .