gre Company Numerical Ability Arithmetic

Q. Each student of a class donated as many 50 paise coins as there were students in the class to a relief fund. The total amount thus raised is Rs 1058. The number of students in the class is:
Option
a) 23
b) 32
c) 40
d) 46

Read Solution (Total 1)

let student be x.
total money collected from one student = .5*x
total money collected from x number of student= 1/2*x*x
therefore, sum of money collected=sum of money raised

1/2*x^2=1058
x^2=2116
x=square root of(2116)
and x=46
ANS (D) 46
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