Question

in a gardan there are 4761 trees if the number of rows and columns are same , how many rows and columns are there (A) 69 (B) 71 (C) 61 (D) 59​

Answer 1

Step-by-step explanation:

Correct option is

A

20

Let there be m rows and n columns.

Since, number of trees in rows is greater than columns by 10

thus, n−m=10 or m=n−10

nm=200

n(n−10)=200

n2−10n−200=0

n=210±100+800

n=210±30

n=20,−10

Neglect the negative value, number of rows =20