Because the cross-sectional diameter of the drum is 1.2m,

So the perimeter of the cross section is1.2x3.14 = 3.768m.

So the roller can cover 3.768x 1.5=5.652 at a time.

Because it scrolls 10 cycles per minute,

So the area covered by the drum per minute is 5.652x 10=56.52 square meters.