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Verified answer
L.PermukaanBola = 4 × π × r²= 4 × 22/7 × 28²
= 4 × 22/7 × 784
= 4 × 2.464
= 9.856 Cm²
NB :
r² = 2 ÷ d
π = 22/7 atau 3.14
Jwbannya adalah c.
Semoga Membantu :) Maaf kalo salah
``»•^°Mystic°^•«``
jari jari = ½×56 = 28cm
π = 22/7
Luas bola = 4×πr²
= 4×22/7×28×28
= 4×22×28×4
= 9856 cm²
semoga membantu