Find the area of a flat circular ring formed by two concentric circles whose radio are 7 cm and 3.5cm.
Answers
Answered by
1
Solution :
Let R, r are radii of two concentric
circles ,
R = 7 cm , r = 3.5 cm
Area of the circular Ring ( A )
= π( R² - r² )
= π( R + r )( R - r )
= ( 22/7 ) ( 7 + 3.5 )( 7 - 3.5 )
= ( 22 × 10.5 × 3.5 )/7
= 22 × 3.5 × 3.5
= 22 × 12.25
= 269.5 cm²
••••
Let R, r are radii of two concentric
circles ,
R = 7 cm , r = 3.5 cm
Area of the circular Ring ( A )
= π( R² - r² )
= π( R + r )( R - r )
= ( 22/7 ) ( 7 + 3.5 )( 7 - 3.5 )
= ( 22 × 10.5 × 3.5 )/7
= 22 × 3.5 × 3.5
= 22 × 12.25
= 269.5 cm²
••••
shrutiverma97:
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Answered by
0
HEY MATE HERE IS YOUR ANSWER
Answer :- 269.5
Step-by-step-explanation :
Let R and r be Radius.
R = 7, r = 3.5
We know that,
A = TT ( R^2 + r^2)
➡️ TT (R+r) (R-r)
➡️ 22/7 (7+3.5) (7 - 3.5)
➡️ 22/7 (10.5) ( 3.5)
➡️ 269. 5 cm
Hope it will help you
@thanksforquestion
@bebrainly
Answer :- 269.5
Step-by-step-explanation :
Let R and r be Radius.
R = 7, r = 3.5
We know that,
A = TT ( R^2 + r^2)
➡️ TT (R+r) (R-r)
➡️ 22/7 (7+3.5) (7 - 3.5)
➡️ 22/7 (10.5) ( 3.5)
➡️ 269. 5 cm
Hope it will help you
@thanksforquestion
@bebrainly
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