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✍pakai bahasa Indonesia
Jawaban:
21. Keliling Ban = 176 cm
Putaran = 1000x
Jarak = Keliling × Putaran
= 176 cm × 1000
= 176.000 cm ==> Ubah menjadi km
= b. 1,76 km
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22. Keliling = 264 m
π × d = 264
22/7 × d = 264
d = 264 ÷ 22/7
d = 264 × 7/22
d = 84 m
r = ½ × d
r = ½ × 84
r = 42 m
Luas = π × r²
Luas = 22/7 × 42²
Luas = 22/7 × 42 × 42
Luas = 22 × 6 × 42
Luas = a. 5.544 m²
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23. Diameter = 63 cm
Keliling = π × d
= 22/7 × 63
= 198 cm
Jarak = 198 m = 19.800 cm
Putaran = Jarak ÷ Keliling
= 19.800 ÷ 198
= c. 100 kali
kalo salah jangan di maafin.
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