The students of class VIII of a school donated Rs 2401 for PM's National Relief Fund.

Let S be the number of students.

Let r be the amount in rupees donated by each student.

The total donation can be expressed by:

$S \times r=$ Rs. 2401

Since the total amount in rupees is equal to the number of students, r is equal to S.

Substituting this in the first equation:

$S \times S=2401$

$S^{2}=(7 \times 7) \times(7 \times 7)$

$S=7 \times 7=49$

So, there are 49 students in the class.