Similar shapes (Volume and surface area)

Oil is stored in either small drums or large drums. The shapes of the drums are mathematically similar.

A small drum has a volume of 0.006m3 and a surface area of 0.2m2

The height of a large drum is 3 times the height of a small drum.

1) Calculate the volume of a large drum?

How do I go about doing this as I know it's not 3 x 0.006

2) The cost of making a drum is £1.20 for each m2 of surface area. A company wants to store 3240m3 of oil in large drums. Calculate the cost of making enough large drums to store this oil?

Any help would be much appreciated.