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Question

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.

A
42
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B
44
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C
49
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D
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×x=x2
Thsu x2=2401 gives x=2401=7×7×7×7=7×7=49
The number of rows = 49

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