Each number of a picnic party contributed twice as many rupees as the total number of members and the total collection was 3042 Rs. The number of members present in the party was :

Each member of a picnic party contributed twice as many rupees as the total number of members and the total collection was 3042 Rs. The number of members present in the party was :
[A]22
[B]32
[C]39
[D]40

39
Let the required number of persons be x.
According to the question, 2x^{2} = 3042
=> x^{2} = \frac{3042}{2}=1521
x = \sqrt{1521} = 39
Hence option [C] is right answer.

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