surface_area = 2 x area_ends + area_curved_side
= 2 x π x radius2 + 2 x π x radius x height
= 2 x π x radius x (radius + height)
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Curved surface area of a cone = pi*radiud*length of slant
width times height
it is 2(lw)+2(wh)+2(hl)
Just add the area of the six squares - that gives you 6a2, where a is the length of one side.
The surface area of a cylinder can be derived from the area of rectangle. If you 'unroll' a cylinder you have a shape of a rectangle, similar to a sheet of paper. The width of the rectangle will be the height of the cylinder and the length of the rectangle will be the circumference of the cylinder end.So, Area = length * widthwhere, width = height of cylinder & length = circumference of cylinder end = PI*(Diameter of cylinder)Therefore,surface area of a cylinder = (PI)*(diameter of cylinder)*(height of cylinder)Hope that helps!