Each member of a picnic party contributed twice as many

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

1. 2
2. 32
3. 40
4. 39

Correct Option: A

Let the required number of persons be N.
According to the question,
2N² = 3042

⇒ N² =	3042	= 1521
	2

⇒ N = √1521 = 39