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Verified answer
R = 70cmt = 130cm
luas permukaan tabung = 2πr(r+t)
2×22/7×70(70+130)
440×200 = 88000cm²➡ 8,8 m²
harga besi
8,8 × 50.000 = 440.000
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Verified answer
L permukaan=2×phi×r×r+2×phi×r×t=(2×22/7×70×70)+(2×22/7×70 ×130)
=30.800 + 57.200
=88.000cm2
=88.000/10.000
=8,8 m2
=50.000×8,8
=Rp 440.000,00