The sum of the circumference of a circle and the perimeter of a rectangle is 130 cm. The area of the rectangle is 104 and the length of the rectangle is 13 cm. What is the area of the circle ?

A box is made in the form of a cube. If a second cubical box has inside dimensions three those of the first bo...

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 z...

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...