Diketahui:
Harga rumput = Rp.6000,00/m²
skala = 1:200
ukuran sketsa:
d1 = 14 cm
d2 = 7 cm
Ditanyakan:
a. sketsa
b. Biaya
Jawab:
a. Terlampir
b. Ukuran asli:
d1 = 14 cm. 200 = 2800 cm = 28 m
maka r1 = 14m
d2 = 7 cm.200 = 1400 cm = 14 m
maka r2 = 7m
Biaya = (L1-L2). Rp.6000,00
= (πr1²-πr2²). Rp.6000,00
= π(14²-7²). Rp.6000,00
= (22/7)(196-49). Rp.6000,00
= (22/7)(147). Rp.6000,00
= Rp.2.772.000,00
Mapel: Matematika
Kelas: 8
Materi: Lingkaran
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Diketahui:
Harga rumput = Rp.6000,00/m²
skala = 1:200
ukuran sketsa:
d1 = 14 cm
d2 = 7 cm
Ditanyakan:
a. sketsa
b. Biaya
Jawab:
a. Terlampir
b. Ukuran asli:
d1 = 14 cm. 200 = 2800 cm = 28 m
maka r1 = 14m
d2 = 7 cm.200 = 1400 cm = 14 m
maka r2 = 7m
Biaya = (L1-L2). Rp.6000,00
= (πr1²-πr2²). Rp.6000,00
= π(14²-7²). Rp.6000,00
= (22/7)(196-49). Rp.6000,00
= (22/7)(147). Rp.6000,00
= Rp.2.772.000,00
Mapel: Matematika
Kelas: 8
Materi: Lingkaran