Let's take the quantity of Rs. \(4.50\) rice bought to be \(x\) kgs.
From the question, we know that
\(4.5x+5(50-x)=240\)
\(4.5x+250-5x=240\)
After solving the above equation, we get
\(250-0.5x=240\)
\(x=\frac{-10}{-0.5}\)
\(x=20\) kgs
The correct option is (C)
A man buys a watch for Rs. 1950 in cash and sells it for Rs. 2200 at a credit of 1 year. If the rate of interest is \(10\%\) per annum, the man.
A man sells Rs. 5000, \(12\%\) stock at 156 and invests the proceeds partly in \(8\%\) stock at 90 and the balance in \(9\%\) stock at 108. He thereby increase his income by Rs. 70. How much of the proceeds were invested in each stock?