Madhya Pradesh Police Exam Model Paper 10

Given
Number of plants = 5625
Concept
By using prime factorization method
Calculation
Let the number of rows be x
⇒ Number of trees in each row = x
⇒ Total number of tree planted $=\mathit{x}\times \mathit{x}$
⇒ Total number of tree planted $={\mathit{x}}^2$
$\Rightarrow {\mathit{x}}^2=5625$
$\Rightarrow \mathit{x}=\sqrt{5625}$
$\Rightarrow \mathit{x}=\sqrt{5\times 5\times 5\times 5\times 3\times 3}$
$\Rightarrow \mathit{x}=5\times 5\times 3$
$\Rightarrow \mathit{x}=75$
⇒ The number of rows = 75
∴ The number of rows = 75