The diameter of the front wheel of the roller is 1.2m, and the width of the front wheel is1.5m. If the roller rotates 15 times per minute, how many meters does the roller advance per minute and the area it runs over per minute? This problem is to find the area of a cylinder (circles at the top and bottom are not needed)

Because the diameter is 1.2m, the circumference of the circle is 2π r =1.2π..

Because the width is 1.5m, the compression area of each circle is1.5x1.2π =1.8π. ..

Because it rotates 15 cycles per minute, the compressed area is 15X 1.8π=27π.

Because π≈3. 14, 27π≈84.78.

Round to 85 square meters.