The surface area of a cube is 5*5*6= 150.

The area of each hole is 1*5*4=20.

Because there are two on each side, a total of six.

(1) If six holes do not intersect, the surface area is

150+20*6- 12 (minus 12 square area) =258.

(2) If there are/kloc-0 holes in six holes, the cross-sectional area of two holes is 270-1 6 = 254.

(3) If there are two of the six holes, the cross-sectional area of the two holes is 270-20=250.

(4) If there are 1 three holes in six holes, the cross-sectional area is 270- 18=252.

(5) If there are two three holes in six holes, the cross-sectional area is 270-24=246.

(6) If six holes have 1 2 holes and one 3 hole, the cross-sectional area is

270- 12-4-6=248

(7) If there are three 2 holes in six holes, the cross-sectional area is 270- 12- 12=246.