luas selimut tabung tertutup dengan jari jari alas 10cm dan volume 1570cm³ adalah.... a.314 cm² b.616 cm² c.628 cm² d.660 cm²

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

Diketahui :
- Bangun : Tabung
- r : 10 cm
- V : 1570 cm³

Ditanya :
- LS tertutup?

V= πr²t
1570= 3,14 x 10 x 10 x t
1570= 31,4 x 10 x t
1570= 314 x t
t= 1570/314
t= 5 cm

LS= πr (r+2t)
LS= 3,14 x 10 (10 + 2 x 5)
LS= 31,4 x (10 + 10)
LS= 31,4 x 20
LS= 628 cm²

Yg C jawabannya.

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