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Berapakah jari-jari bola jika Luas kulit bola 616 cm2 dan π = 22/7!

Rani Maharani

Soal

Pembahasan

Diketahui luas kulit bola (L) = 616 cm² dan π = 22/7.

Luas kulit bola = 4πr², maka kita dapat tuliskan:

616 = 4 × 22/7 × r²

r² = 616 × 7 / (4 × 22)

r² = 49

r = √49

r = 7

Jadi, jari-jari bola tersebut adalah 7 cm.

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