Jawaban:
K = π × d
88 = 22/7 × d
d = 88 ÷ 22/7
d = 88 × 7/22
d = 28 m.
r = ½d = ½(28) = 14 m.
L = π × r²
L = 22/7 × 14 × 14
L = 22 × 2 × 14
L = 616 m².
Biaya = 616 × 30.000 = Rp 18.480.000,00
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Jawaban:
K = π × d
88 = 22/7 × d
d = 88 ÷ 22/7
d = 88 × 7/22
d = 28 m.
r = ½d = ½(28) = 14 m.
L = π × r²
L = 22/7 × 14 × 14
L = 22 × 2 × 14
L = 616 m².
Biaya = 616 × 30.000 = Rp 18.480.000,00