Son's age is now one-third of father's age. In twelve years from now son's age will be one half of the father's age . What is the son's age in years now ?

A man walked 2 miles east, then 2 miles south , then again 4 miles east and finally 10 miles north. How far di...

The ratio of boys and girls in a class is 1:2 and the class as 24 students . How many boys would have to be ad...

A book sells for TK. 65. This price gives the seller a profit of 30% on his cost. What will be the new selling...

A wheel makes 1000 revolutions in covering a distance of 88 km. The diameter of the wheel is -

The average age of 12 students is 20 years. If the age of one more student is included, the average decreases...

A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to rai...