The students of Class VIII of a school donated ₹ 2401 in all for the Prime Minister’s National Relief Fund. Each student donated as many rupees as the number of students in the class. Find the number of students in the class
Solution:
Each student donated as many rupees as the number of students in the class i.e. money donated by each student is equal to the number of students in the class.
Thus, the total amount of donation is equal to the product of the number of students in the class and money donated by each student.
Let the number of students in a class be x
So, money donated by each student is also x (as they donated as much amount as the number of students in the class).
The total amount of donation = ₹ 2401
Total amount of donation = Number of students × Money donated by each student
2401 = x × x
2401 = x2
x = √2401
x = √(7 × 7 × 7 × 7) [By prime factorising 2401]
x = √72 × 72
x = √(7 × 7)2
x = 7 × 7 = 49
Therefore, the number of students in class is 49.
☛ Check: NCERT Solutions for Class 8 Maths Chapter 6
Video Solution:
The students of Class VIII of a school donated ₹ 2401 in all for the Prime Minister’s National Relief Fund. Each student donated as many rupees as the number of students in the class. Find the number of students in the class
NCERT Solutions for Class 8 Maths Chapter 6 Exercise 6.3 Question 7
Summary:
The students of Class VIII of a school donated ₹ 2401 in all for the Prime Minister’s National Relief Fund. Each student donated as many rupees as the number of students in the class. The number of students in the class is 49.
☛ Related Questions:
- What could be the possible ‘one’s’ digits of the square root of each of the following numbers? (i) 9801 (ii) 99856 (iii) 998001 (iv) 657666025
- Without doing any calculation, find the numbers which are surely not perfect squares. (i) 153 (ii) 257 (iii) 408 (iv) 441
- Find the square roots of 100 and 169 by the method of repeated subtraction.
- Find the square roots of the following numbers by the Prime Factorisation Method. (i) 729 (ii) 400 (iii) 1764 (iv) 4096 (v) 7744 (vi) 9604 (vii) 5929 (viii) 9216 (ix) 529 (x) 8100
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