example radius ratio

For the stability of an ionic compound, each cation should be surrounded by maximum number of anions and vice versa. The number of oppositely charged ions surrounding each ion is called its co-ordination number. The larger is the size of the cation the greater is its coordination number. In other..

The radius of the cylinder is equal to the radius of the sphere in the figure. What is the ratio of the surface area of the sphere to the surface area of the cylinder? => 2 : 5 or 1 : 2 or 1 : 4 or 1 : 3..

What is the ratio of the surface area of a sphere with radius 1 in. to the surface area of a sphere with radius 2 in.? => 1 : 5 or 1 : 4 or 4 : 1 or 3 : 2..

Ratio - Ratio is the numerical relation of one quantity to another of the same kind. To find the ratio of 2 m 25 cm to 75 cm, we first change 2 m 25 cm into cm, which equals 225 cm. Now, we have to find 225 cm to 75 cm ratio is = 3 : 1 We can write the above ..

The radius is the lateral bone of the forearm. It is a long bone with a shaft and two extremities. It is shorter than the ulna. The upper extremity of the radius is small and shows button-shaped head with a shallow upper surface for articulation with the capitulum of the humeru..

A race track is in the form of a ring. The ratio of inner radius to the outer radius is 3 : 5. If the area of the outer circle is 100 m 2 , then find the area of the track. => 64 m 2 or 36 m 2 or 136 m 2 or 100 m 2..

> Again from the right angled triangle ABD body diagonal But as shaded sphere touches other spheres evidently body diagonal AD = 2(R + r) Dividing equation (ii) by equation (i) we g..

Find the ratio of perimeter of a square to the circumference of a circle having side length equal to the radius r of the circle. => 2 π or 2 r or 2 π or π 2..

Find the ratio of surface area to volume of a cone submersible with height and radius equal to c . => 2 + 1 3 c or 3 ( 2 + 1 ) c or 1 c or 9 c..