Jawaban singkat:
Penjelasan dg langkah²:
Panjang lintasan roda = keliling roda x jumlah putaran roda
2.772 km = keliling lingkaran x 200
277.200.000 cm = (2 x [tex]\frac{22}{7}[/tex] x r) x 200
2 x [tex]\frac{22}{7}[/tex] x r = 277.200.000 cm : 200
[tex]\frac{44}{7}[/tex] x r = 1.386.000 cm
r = 1.386.000 cm : [tex]\frac{44}{7}[/tex]
r = 1.386.000 cm x [tex]\frac{7}{44}[/tex]
r = 220.500 cm
Luas roda = luas lingkaran
Luas roda = π x r²
Luas roda = [tex]\frac{22}{7}[/tex] x 220.500 cm x 220.500 cm
Luas roda = 152.806.500.000 cm²
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Jawaban singkat:
152.806.500.000 cm²
Penjelasan dg langkah²:
Panjang lintasan roda = keliling roda x jumlah putaran roda
2.772 km = keliling lingkaran x 200
277.200.000 cm = (2 x [tex]\frac{22}{7}[/tex] x r) x 200
2 x [tex]\frac{22}{7}[/tex] x r = 277.200.000 cm : 200
[tex]\frac{44}{7}[/tex] x r = 1.386.000 cm
r = 1.386.000 cm : [tex]\frac{44}{7}[/tex]
r = 1.386.000 cm x [tex]\frac{7}{44}[/tex]
r = 220.500 cm
Luas roda = luas lingkaran
Luas roda = π x r²
Luas roda = [tex]\frac{22}{7}[/tex] x 220.500 cm x 220.500 cm
Luas roda = 152.806.500.000 cm²