Quiz about Areas Related To Circles

Question 1

What is the diameter of a circle whose area is equal to the sum of the areas of two circles of radii $$40 {~cm}$$ and $$9 {~cm} ?$$

Accepted Answer

Covalent bond

Answer

$$82 {~cm} $$

Answer

$$84 {~cm} $$

Answer

$$87 {~cm} $$

Answer

$$89 {~cm} $$

Question 2

If the sum of the areas of two circles with radii $$ R_1 $$ and $$R_2$$ is equal to the area of a circle of radius $$R$$ then :

Accepted Answer

Covalent bond

Answer

$$R^{2}=R_1^{2}+R_2^{2}$$

Answer

$$R_1+R_2=R$$

Answer

$$R_1+R_2 $$ is less than $$R$$

Answer

$$R_1^{2}+R_2^{2}$$is less than $$R^{2}$$

Question 3

If the sum of the circumferences of two circles with radii $$R_1$$ and $$R_2$$ is equal to the circumference of a circle of radius $$R$$, then

Accepted Answer

Covalent bond

Answer

$$R_1+R_2=R$$

Answer

$$R_1+R_2;R$$

Answer

$$R_1+R_2;R$$

Answer

Nothing definite can be said about the relation among $$R_1,R_2$$ and $$R$$

Question 4

The area of the square that can be inscribed in a circle of radius $$8 {~cm}$$ is

Accepted Answer

Covalent bond

Answer

$$128 {~cm}^{2}$$

Answer

$$256 {~cm}^{2}$$

Answer

$$ 64 \sqrt 2 ~cm^2$$

Answer

$$64 {~cm}^{2}$$

Question 5

The radius of a circle whose circumference is equal to the surn of the circurnferences of the two circles of diameters $$36 {~cm}$$ and $$20 {~cm}$$ is

Accepted Answer

Covalent bond

Answer

$$28 {~cm}$$

Answer

$$56 {~cm}$$

Answer

$$42 {~cm}$$

Answer

$$16 {~cm}$$

Areas Related To Circles Cbse Class 10 Maths Problems and Solutions

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