The average of a a, b, c is 6 and a-b =4, ab = 21, What is the value of c ?
A truck driver must complete a 180-mile trip in 4 hours. If his average speed is 50 miles per hour for the first 3 hours, then how fast must he travel for the final hour ?
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 did he walk from the starting point ?
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 admitted to the class in order to make the ratio of boys to girls 1 : 1?
A book sells for TK. 65. This price gives the seller a profit of 30% on his cost. What will be the new selling price if he cuts his profit to 10% of its cost ?
what is the length of proposed Padma Bridge ?
In which year will we achieve the Millennium Development Goal (MDG) ?
which of the following is the food for trees?
which of the following is the soft loan window of the World Bank (WB) ?