The ratio of the salaries of Radha and Sudha is 6 : 7. If the salary of each of them increases by Rs. 3,000, then the ratio becomes 8 : 9. What is Radha's new salary?
Which of the following statement(s) is/are true? A. Out of 114 elements, 22 are non-metals, and others are ores. B. Every ore is a mineral but a mineral is not an ore.