the areas of two circles are in the ratio 16:25. find the ratio of their circumference
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Answered by
220
Hi ,
Let r and R are radii of two circles ,
Ratio of their areas = 16 : 25
πr² : πR² = 16 : 25
r² / R² = ( 4/5 )²
r / R = 4/5-----( 1 )
Ratio of circumferences = 2πr / 2πR
= r / R
= 4/5
[ From equation ( 1 ) ]
= 4 : 5
I hope this helps you.
:)
Let r and R are radii of two circles ,
Ratio of their areas = 16 : 25
πr² : πR² = 16 : 25
r² / R² = ( 4/5 )²
r / R = 4/5-----( 1 )
Ratio of circumferences = 2πr / 2πR
= r / R
= 4/5
[ From equation ( 1 ) ]
= 4 : 5
I hope this helps you.
:)
Answered by
23
Answer:
16:25
r square/r square =(4/5)
r/R=4/5
ratio of circumference=2pi.r/2pi.r
=r/R
=4/5
answer is 4/5
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