In a dairy firm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk.

A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. In what time can...

In what time will atrain 100 meters long cross an electric pole, if its speed is 144 km/hr.?

Average of all prime numbers between 30 to 50 is:

If the cost price is 25% of selling price then what is the profit percent?

A and B together have Tk. 1210. If 4/15 of A's amount is equal to 2/5 of B's amount. How much amount B has?

If a person walks at 14 km/hour instead of 10 km/hour, he would have walked 20 km more. The actual distince tr...