Question

Find the area of shaded portion. if radii of inner and outer circles are 21 cm and 28 cm
respectively
​

Answer 1

Answer:

1078 cm²

Step-by-step explanation:

Radius of inner circle = 21 cm

Area of inner circle = 22/7 × (21)² = 1386 cm²

Radius of outer circle = 28 cm

Area of outer circle = 22/7 × (28)² = 2464 cm²

Area of shaded region = (2464 - 1386) cm² = 1078 cm²