If 2 kg of metal, of which 1/3 is zine and the rest is copper , be mixed with 3 kg of metal, of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?

One filling pipe P is three times faster than another filling pipe Q , If P can fill the tank in 24 hours, the...

A box contains 4 tennis ball 6 season and 8 dues balls . 3 balls are randomly drawn from the box. What is the...

Rahim and Karim donated Tk. 100. each in charity . Karim gives each tk. 1 more than Rahim and Rahim distribute...

A square is inscribed in a circle of diameter 2 a sand another square is circumscribing circle. The difference...

The income of 'A' is 20% higher than that of 'B' . The income of 'B' is 25% less than of 'C' What percent less...

is equal to -