sebuah tabung berdiameter 28vm, dengan tinggi 10cm , hitunglah luas permukaan tabung
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d = 28 cm
r = d/2
r = 28/2
r = 14 cm
t = 10 cm
Luas permukaan tabung
Lp = 2 × π × r × (r + t)
Lp = 2 × 22/7 × 14 × (14 + 10)
Lp = 2 × 22/7 × 14 × 24
Lp = 2 × 22 × 2 × 24
Lp = 2.112 cm²
luas tabung = 2 × π × r × (r + t)
Lp = 2 × [tex]\frac{22}{7}[/tex] × 14 × (14 + 10)
Lp = 2 × [tex]\frac{22}{7}[/tex] × 14 × 24
Lp = 2 × 22 × 2 × 24
Lp = 2.112 cm²
