Huanggang Junior Champion, Grade 6, Volume 2, Mathematics, Page 26, Question 4, Answer, Speed, Dear friends. . . . . . . . . We are newcomers and don't have much wealth. Wang Liang
I.3× 20000 = 60000100 = 600 meters.
6× 20000 =120000 ÷100 =1200m
Length1200m, width 6000m.
2. 1200× 600 = 720000m？
720000 = 72km
It covers an area of 72 square kilometers.