Question

In the given figure, the area enclosed
between the concentric circles is 770 cm²
If the radius of the outer circle is
21cm, calculate the area of the inner
circle.​

Answer 1

Answer:

figure is missing... plz provide figure

Answer 2

Answer:

Let the radius of the inner circle be r cm. Then,

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=7707

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722 ×(441−r

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722 ×(441−r 2

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722 ×(441−r 2 )=770r 2

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722 ×(441−r 2 )=770r 2 =196

Let the radius of the inner circle be r cm. Then,(π×21×21)−πr 2 =770π(441−r 2 )=770722 ×(441−r 2 )=770r 2 =196r=14 cm