You already know:
c = 50 cm therefore
For the brim you need a circle with the radius
h = 60 cm therefore the length of the slanted line is
The circumference of the head is c = 50 cm. The angle of the sector which is used to make the curved surface of the cone is
The total surface area is
With all those formulae you can do (most of) the questions.
If you need additional informations, please ask again.