A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?

A train travels 10 miles at a speed of 50 miles per hour. How fast must the train teavel on the reture trip if...

Sumon bought 2 varieties of rice, costing Taka 8 per kg and Taka 12 per kg each and mixed them in some ratio....

A trapezium has a total area of 25 square feet. If height of this trapezium is 2 feet and one of the two paral...

In a basket the ratio of banana and apple is 3 : 2. If 5 bananas are removed from the basket then the ratio be...

How many 3-digital integers are multiple of 5?

In a set, there are 17 consecutive integers with a maximum value of 8, what is the average of this set?