Question

Students are standing in a school assembly line in such a way that the number of rows is equal to the number of columns. If the total number of students is 36, then, how many rows and columns will be there?

• A. 3
• B. 6
• C. 12
• D. 18

Answer 1

The correct option is B

6

Since the number of rows is equal to the number of columns, they are making a square.

Let side of the square be ${}^{\prime }{a}^{\prime }$

Total number of studens $=a\times a=a^2$

Hence $a^2=36$

$a=\sqrt{36}$

$a=\sqrt{2\times 2\times 3\times 3}$

$a=2^2\times 3^2$

$a=2\times 3$

$a=6\text{cm}$

So, they are making 6 rows and 6 columns.