Question

The radius of an outer circle is 21cm and the inner circle is 14cm. Find the area of an cricular ring.​

Answer 1

Here is your answer >>

External radii => R = 21 cm

Internal radii => r = 14 cm

Area of circular ring =>

pai (R^2-r^2)

=> Area of circular ring =

22/7 (21^2-14^2)

=> 22/7 x 245

=> 770 cm^2

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Answer 2

Answer:

here is your answer =>

R = 21

r = 14

Area of circular ring => pai (R^2-r^2)

=> Area of circular ring => pai (21^2-14^2)

=> 22/7 x 245

=> 770 cm^2

.

.

.

hope it's help you ...!!

plz mark as brain list ...!! :-)