14. the circumterence of a circle increases from 4-parallel to 8- parallel , then its area is?
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Step-by-step explanation:
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Answered by
0
Answer:
Let C
1
, r
1
, A
1
be the circumference, radius and area of circle with circumference as 4π
Let C
2
, r
2
, A
2
be the circumference, radius and area of circle with circumference as 8π
Given,
C
1
=4π and ,C
2
=8π
∴
C
2
C
1
=
8π
4π
⇒
2πr
2
2πr
1
=
8
4
⇒
r
2
r
1
=
2
1
Now,
A
2
A
1
=
πr
2
2
πr
1
2
=>
A
2
A
1
=(
2
1
)
2
⇒
A
2
A
1
=
4
1
⇒A
2
=4A
1
∴ Area will be quadrupled.
Step-by-step explanation:
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