Due to reduction of 20% price in wheat, A man can get 10 kg more in Rs 600. New rate of wheat is–
Correct Answer: Option C
Let initial price = Rs x,
New price = Rs \(\left( {x \times \frac{{80}}{{100}}} \right) = Rs\frac{{4x}}{5}/kg\)
\(\begin{array}{l} \therefore \frac{{600}}{{\left( {4x/5} \right)}} - \frac{{600}}{x} = 10\\ \Rightarrow \frac{{750}}{x} - \frac{{600}}{x} = 10 \end{array}\)
⇒ x = 15
∴ New price = Rs \(15 \times \frac{4}{5} = Rs12/kg\)
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