Question

The area of ring between two concentric cicles whose redii are 4 cm and 3 cm is​

Answer 1

Answer:

Area of ring = Area of C₁ - Area of C₂

                    = πR² - πr²

                    = π(R² - r²)

                    = π(4² - 3²)

                    = π(16-9)

                    = 22/7 × 7 = 22cm²