Question

$circle \: perimeter \: is \: 3\pi \: cm.what \: is \: area$
​

Answer 1

The perimeter and the area of a semi-circular plate of radius 25 cm are, respectively (Take π = 3.14)

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ANSWER

Given−

theradiusofasemicircle=25cm.

Tofindout−

theperimeter=Candarea=Aofthesemicircle=?

Solution

Weknowthat

theperimeterofasemicircle=C

=thesemicirculararc+thediameter=πr+2r

⟹C=r(π+2)=25(3.14+2)=128.5cm.

Againar.semicircle=A=

2

1

πr

2

whenr=radiusofthecircle

⟹A=

2

1

×

7

22

×25

2

cm

2

=981.25cm

2

.

Ans−OptionB.

solution

Answer 2

Answer:

hope it is clear to you please mark as brilliant answer