If the annual rate of simple interest increases from 8% to \(12\tfrac{1}{2}\%\), a person’s yearly income increased by Rs. 639. The principal amount (in Rs) is:
the value of \(\dfrac{\dfrac{3}{7} + 1\tfrac{2}{3} \times 6 - \left(3\tfrac{1}{2} \div \dfrac{3}{5} \text{ of } \dfrac{7}{9}\right) \text{ of } \dfrac{2}{3}}{\dfrac{1}{7}\left(4 \div \dfrac{1}{5} \text{ of } 10\right) - 3}\)
A sum of money is distributed among P, Q, R and S in the ratio 3 : 4 : 5 : 6, respectively. If R gets Rs. 500 more than P, then the sum of all their shares (in Rs) is:
The sum of the cost prices of two bikes is Rs. 50,000. The first bike was sold at a profit of 20% and second bike at a loss of 20%. If the selling prices are the same, what is the cost price (in Rs) of the second bike?