C-05-Q136: Each of $n$ students contributes $30$ paisa more than the number of st… | প্রশ্ন করি

C-05-Q136mediumsingle_mcq

Each of $n$ students contributes $30$ paisa more than the number of students. Total Tk. $70$ . Then $n =$ —

Each of $n$ students gives $(n+30)$ paisa, and Tk. $70=7000$ paisa, so $n(n+30)=7000$ . Solving gives , hence .

136/170

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80

30)=

7000

n^2+30n-7000=0

(n-70)(n+100)=0

n=70

C-05-Q145