There are 2401 students in a school. A P.T teacher wants them to stand in rows and columns such that the number of rows is equal to the number of columns. Find the number of rows.

42

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44

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49

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50

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Solution

The correct option is B $49$
Let the number of rows be $x$ so the number of columns will be $x$ .
Therefore, number of students = $x \times x = x^{2}$
Thsu $x^{2} = 2401$ gives $x = \sqrt{2401} = \sqrt{7 \times 7 \times 7 \times 7} = 7 \times 7 = 49$
The number of rows = $49$

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There are 2401 students in a school. A P.T teacher wants them to stand in rows and columns such that the number of rows is equal to the number of columns. Find the number of rows.

The correct option is B 49Let the number of rows be x so the number of columns will be x. Therefore, number of students = x×x=x2Thsu x2=2401 gives x=√2401=√7×7×7×7=7×7=49The number of rows = 49

The correct option is B $49$
Let the number of rows be $x$ so the number of columns will be $x$ .
Therefore, number of students = $x \times x = x^{2}$
Thsu $x^{2} = 2401$ gives $x = \sqrt{2401} = \sqrt{7 \times 7 \times 7 \times 7} = 7 \times 7 = 49$
The number of rows = $49$