The radius of a wire is decreased to one third. If volume remains the same, length will increase by :

A circle circumscribes a rectangle with sides 16 cm and 12 cm. What is the area of the circle?

The ratio of the volume of a cube to that of a sphere which will fit inside the cube is

In an isosceles triangle, the measure of each of equal sides is 10 cm and the angle between them is 45°. the area of the triangle is

How many hemispherical balls can be made from a cylinder 56 cm high and 12 cm diameter, when every ball being 0.75 cm in radius? 

The ratio of the side and height of an equilateral triangle is –

The area of an equilateral triangle is 25√3 cm², then its perimeter is –

The number of coins of radius 0.75 cm and thickness 0.2cm required to be melted to make a right circular cylinder of height 8 cm and base radius 3 cm is: