Question

The radius of the larger circle is 10 cm. The radius of the smaller circle is 5 cm. What is the approximate area of the shaded region? Large shaded circle containing a smaller white circle inside the larger circle. 70.7 square centimeters 86.5 square centimeters 102.4 square centimeters 235.5 square centimeters

Answer 1

area of shaded region=π(R²-r²)

R=Bigger radius
and r=smaller radius

∴π(10²-5²)
π(100-25)
π75
let's take π=3.14
3.14×75=235.5 cm²