Answer:
Let the number of students in the class be \[x\]. Then rupees donated by each student = Rs \[x\]. \[\therefore \] Rupees denoted by \[x\] students \[=\,\text{Rs}\,x\times x\] \[=\text{Rs}\,{{x}^{2}}\] \[\therefore \] The students of class VIII of a school donated Rs 2401 for Prime Minister's National Relief Fund. \[\therefore \] \[{{x}^{2}}=2401\] \[\Rightarrow \] \[x=\sqrt{2401}\]. The prime factorisation of 2401 is
\[2401=\underline{7\times 7}\times \underline{7\times 7}\] \[\therefore \] \[x=\sqrt{2401}\,=\sqrt{\underline{7\times 7}\times \underline{7\times 7}}\] \[\Rightarrow \] \[x=7\times 7=49\] Hence, the number of students in the class is 49. 7 2401 7 343 7 49 7
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