A man bought $500$ metres of electronic wire at $50$ paise per metre. He sold $50 \%$ of it at a profit of $5 \%$ At what percent should he sell the remainder so as to gain $10 \%$ on the whole transaction?

  • A

    $13$

  • B

    $12.5$

  • C

    $15$

  • D

    $20$

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