A water tank has two taps (Tap1 -Tap2) . Tap -1 can fill a tank in 8 hours and Tap- 2 can empty the tank in 16 hours. How long will they take to fill the tank if both taps are opened simultaneously but tap-2 is closed after 8 hours?

A cylindrical rod of iron, whose height is equal to its radius ,is melted and cast into spherical balls whose...

A company produces five types of shirts -- A,B,C,D and E-using cloth of three qualities -- high, medium and lo...

Rahim borrowed Tk. 800 at 6% per annum and karim borrowed tk. 600 at 10% per annum .After how much time, will...

The average of 6 numbers is 25. If 3 more numbers, with an average of 22 are added to these numbers, what will...

The product of two positive numbers is p. If each of the numbers is increased by 2, the new product is how muc...

If a>b>1 , then which of the following is true?