1. The price of corn rose by 20% two years ago and 15% last year. What is the combined percent increase in price?
3. Present ages of Saleh and Anu are in the ratio of 5:4 respectively. Three years later, the ratio of their ages will become 11:9 respectively. What is Anu's present age in years?
4. Salaries of A, B and C are in the ratio 2:4:6. Salary of Band C together is Tk. 12,000 By what percent is salary of C more than that of A?