1. Front wheel rotation of roller 1 turn. What is a pressing area? Side length 1.6m, base diameter 5m,

3.14× 5×1.6 = 25.12 (m2)

2. A cylindrical pool, the floor of the inner wall of the pool should be inlaid with tiles. The diameter of the bottom is 6m, and the depth of the pool is1.2m.. What is the maximum area of tiles?

3.14× 6/2× 6/2+3.14× 6×1.2 = 50.868 (square meter)