Question

a gardener planted 1521 trees in a row such that number of the rows was equal to the number of the plants in each row find the number of rows

Answer 1

$1521 = 3 {}^{2} \times 13 {}^{2} \\ number \: of \: rows \: = 3 \times 13 \\ = 39$

Answer 2

let number of rows = x

number of plants in each row = x

total number of plants = 1521

there fore x * x = 1521

x^2 = 1521

x = square root of 1521    or    1521^1/2

1521= 39 X39

X = 39

number of palnts and number of rows = 39