Arranged 80453

There are 390 trees arranged in rows in the orchard. How many rows are there if each row has the same number of trees greater than 30 and less than 40?

Correct answer:

n =  10

Step-by-step explanation:

n a = 390 30<a<40  n1=390/30=13 n2=390/40=439=943=9.75  390 = 2 × 3 × 5 × 13  9<n<13 1012 n=2 5=10   Verifying Solution:  s1=390/10=39 s2=390/11=11390=3511535.4545 s3=390/12=265=3221=32.5

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