(1) Xiaohong starts from home, heading east for 60. Walk 800 meters to the exhibition hall, and then 60 meters east and south. Walk 600 meters to the library and return 60 meters from the library to the northwest. Walk 600 meters to the exhibition hall, then walk 60 meters south and west. Walk 800 meters to Xiaohong's house.

(2) (800+600) × 2 ÷ (19+21) = 70 (m/min)