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= 12 cm : 2
= 6 cm
r₂ = d₂ : 2
= 24 cm : 2
= 12 cm
L₁ = π × r₁²
= 3,14 × 6²
= 3,14 × 36
= 113,04 cm²
L₂ = π × r₂²
= 3,14 × 12²
= 3,14 × 144
= 452,16 cm²
Selisih = L₂ - L₁
= 452,16 cm² - 113,04 cm²
= 339,12 cm²
Perbandingan = L₁ : L₂
= 113,04 : 452,16
= 1 : 4
= 113,04
π.r² = 3,14 x 12 x 12 = 3,14 x 144
= 452,16
selisih= 452,16-113,04 = 339,12
perbandingan= 1 : 4.