A , B and C are employees of the same company earning salaries in the ratio 2:3:4. If they received increments of 20%, 20% and 30% respectively in their salaries, then what will be the new ratio of their salaries?

If the length of each side of a rectangle is increased by 40%, then what is the percentage increase in the area of the rectangle?

Mr. Mendis, who was born in 1958, will be twice as old as his son, Lahiru, in 2022. How old is Lahiru now?

One student has got 45 marks for a Math test. But it was recorded wrongly as 75 in the mark sheet of the class. After the correction was made, the class average (mean) of the test went down by 1.5 marks. How many students took the test?

A garage owner buys a used car for Rs.3.2 million and spends Rs. 800 000 to repair it before selling the car for Rs. 4.8 million. What is the profit percentage?

Raja invested an amount of Rs. 3240 at 4.5% per annum of simple interest. How long will it take Raja to receive Rs.729 as interest?