The average age of a man and his son is 28 years. The ratio of their ages is 3 : 1. What is the man's age?

If 43x + 43y = 4816, what is the average of x and y?

The radius of a circular garden is 7 metres more than the length of a rectangle whose perimeter is 364 metres and breadth is 84 metres. What will be cost of fencing the garden (only at the circumference), if the cost of fencing is Rs.8 per metre?

The cost of 8 fans and 14 ovens is Rs.36520. What is the cost of 12 fans and 21 ovens (in Rs.)?

In order to pass in an examination, a student is required to get 280 marks out of the aggregate marks. Hema got 264 marks and was declared failed by 2 percent. What is the minimum passing percentage of the examination?

The difference between 20% of a number and 7/15 of the same number is 124.What is 40% of that number?