Question

SOLVE THIS ONE........!!!!!!!!! ☺☺

Answer 1

Answer:66.

Step-by-step explanation:

From the figure,

perimeter of shaded region= arc ARC+arc APB +arc DOC+arc DSB

                       =(22/7)*7 +(22/7)*3.5+(22/7)*3.5+(22/7)*7

                          = 22+11+11+22

                           =66.

Answer 2

Perimeter of the Shaded Region = Circumference of Bigger Circle + Circumference of the Smaller Circle

We know that : Circumference of a Circle is given by : 2πr

Given : Radius of Bigger Circle = 7 cm

⇒ Circumference of Bigger Circle = 2π × 7 = 14π

Given : Radius of Smaller Circle = 3.5 cm

⇒ Circumference of Smaller Circle = 2π × 3.5 = 7π

⇒ Perimeter of Shaded Region = (7π + 14π) = 21π = 66 cm