3249 persons are sitting in a cinema hall in such a manner that there are as many persons in a row as there are rows in the hall find the number of rows

Answer 1

people=number rows*numberseatsperrow
people= r^2
solve for r.

Answer 2

Let x=number of rows, and
since number of rows = number of persons per row, we have
x*x=3249, or
x=sqrt(3249)
take out your calculator and find x.