The length is 20 meters more than the width, that is, 60 meters long and 40 meters wide.
The total area of this land is 60 * 40 = 2400 square meters.
Small area: (2400-200)/2= 1 100 square meters.
Large area: 2400-1100 =1300m2.
2. After losing 35 sheep and adding 35 cows, adding 35*2=70 cows;
At this time, there are 3 1 more cattle than sheep. It shows that sheep are 35*2-3 1=39 more than cattle.
Originally, there were: (67 1-39)/2=3 16 cows.
Originally there were 67 1-3 16=355 sheep.
I am a math teacher, that's right! You have to use your own brain in the future. Draw a picture, it's simple! !