xdf 补充, section 16

WalkByFaith

7. If a certain grove consists of 36 pecan trees, what was the yield per tree last year?

‍(1) The yield per tree for the 18 trees in the northern half of the grove was 60 kilograms last year.

‍(2) The yield per tree for the 18 trees in the eastern half of the grove was 55 kilograms last year.

key is e)????

flyfly

the first 18 trees are in the northen,the second 18 trees are in the eastern, 不是在南面，分清方向