it will take me a while to figure out how to type the letter "pi" here, but just give you a hint, you calculate the area of the top of the can, and double it, then times 6; then calculate the perimeter of the top, times the height of the can, and times 4; add the two results, and you will get the answer.

btw, in order to figure out the height, you need to use the volume divide by the top area.