Penjelasan dengan langkah-langkah:
ini yaaa semoga membantu aminnn
a. L=L.bola+L.selimut tabung
=(4×phi×r²) + (phi×d×t)
=(4×22/7×21/2²) + (22/7×21×12)
=1386 + 792
=2178 cm²
b. L=Luas balok + L prisma segitiga
= [ (2×25×12) + (2×12×6) + (25×6) + (14×6) ] + [ (2×1/2×8×11) + (6×8) +(13,6×6) ]
= [600+144+150+84] + [88+48+81,6]
=978 + 217,6
=1195,6 cm²
c. L = L balok 1 + L balok 2
= [(2×12×15) + (2×40×15) + (12×40) + (12×30)] + [(2×8×12)+(2×10×8)+(10×12)]
= [ 360 + 1200 + 480 +360 ] + [192 + 160 + 120]
= 2400 + 472
= 2872 cm²
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Penjelasan dengan langkah-langkah:
ini yaaa semoga membantu aminnn
Penjelasan dengan langkah-langkah:
a. L=L.bola+L.selimut tabung
=(4×phi×r²) + (phi×d×t)
=(4×22/7×21/2²) + (22/7×21×12)
=1386 + 792
=2178 cm²
b. L=Luas balok + L prisma segitiga
= [ (2×25×12) + (2×12×6) + (25×6) + (14×6) ] + [ (2×1/2×8×11) + (6×8) +(13,6×6) ]
= [600+144+150+84] + [88+48+81,6]
=978 + 217,6
=1195,6 cm²
c. L = L balok 1 + L balok 2
= [(2×12×15) + (2×40×15) + (12×40) + (12×30)] + [(2×8×12)+(2×10×8)+(10×12)]
= [ 360 + 1200 + 480 +360 ] + [192 + 160 + 120]
= 2400 + 472
= 2872 cm²