tolong bantu jawab.. make cara ya

Please, let me answer your question :)
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Mapel : Matematika
Tentang : Bangun Datar dan Ruang
Pembahasan :

Diketahui :
- d = 42 cm > r = 21 cm
- sudut = 60°

Ditanya :
- L arsir

L= 60°/360° x πr²
L= 1/6 x 22/7 x 21 x 21
L= 1/6 x 22 x 3 x 21
L= 1/6 x 66 x 21
L= 11 x 21
L= 231 cm²

Yg D jawabannya.

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Diketahui :
- p = 4 m > 400 cm
- l = 10 cm
- t = 16 cm
- Dipotong 4 bagian

Ditanya :
- V tiap potong

V= p x l x t
V= 400 x 10 x 16
V= 4000 x 16
V= 64.000 cm³

V= 64.000 : 4
V= 16.000 cm³

Yg C jawabannya.

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Heil Manstein!