Subject

    Quantitative Aptitude

    Topic

    Percentage

    Due to reduction of 20% price in wheat, A man can get 10 kg more in Rs 600. New rate of wheat is–

    ক)
    Rs 11.50 / kg
    খ)
    Rs 12.50 / kg
    গ)
    Rs 12 / kg
    ঘ)
    Rs 13 / kg
    ঙ)
    None of these

    Explanation

    Let initial price = Rs x, New price = Rs (x×80100)=Rs4x5/kg\left( {x \times \frac{{80}}{{100}}} \right) = Rs\frac{{4x}}{5}/kg ∴600(4x/5)−600x=10⇒750x−600x=10\begin{array}{l} \therefore \frac{{600}}{{\left( {4x/5} \right)}} - \frac{{600}}{x} = 10\\ \Rightarrow \frac{{750}}{x} - \frac{{600}}{x} = 10 \end{array} ⇒ x = 15 ∴ New price = Rs 15×45=Rs12/kg15 \times \frac{4}{5} = Rs12/kg

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