Question

Two concentric circles forms a circular track one has a diameter of 28m and other has a diameter of 70 m

Answer 1

here is your answer.........

Answer 2

Diameter ( 1 ) = 28 m

Radius = D / 2

=> 28 / 2 m

=> 14 m

Diameter ( 2 ) = 70 m

Radius = D / 2

=> 70 / 2 m

=> 35 m


And as we know that

Area = π ( R² - r² )

=> 22 / 7 ( 35² - 14² )

=> 22 / 7 ( 35 - 14 ) ( 35 - 14 )

=> 22 / 7 × 21 × 21

=> 1386

Area = 1386 m²