(2) The iron sheet area required for manufacturing chimneys. B

(3) Find out the area of the trademark paper on the cans. b

(4) The area of iron sheet needed to make the tea bucket. d

(5) The area of iron needed to make a barrel without a lid. c

(6) Draw the pillars of the hall and find the painting area. b

(7) Plaster cement on the wall and bottom of the pool to find out the plastering area. c

(8) Iron sheet area required for manufacturing oil drums. d

(9) The roller of the road roller rotates once to obtain the road pressing area. b

(10) Plastic area needed for making plastic pen container. C

A, find the bottom area b, lateral area c, 1 bottom area and lateral area d, and find the surface area.

So the answer is: a, b, b, d, c, b, c, d, b, C.