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5024 m = 502400 cm
502400 / 2000 = 251,2 cm
2πr = 251,2
πr = 251,2 / 2
πr = 125,6
r = 125,6 / π
r = 125,6 / 3,14
r = 40 cm
luas = πr²
= 3,14 * 40²
= 3,14 * 1600
= 5024 cm²
5024 m = 502400 cm = 251,2 cm
2000
keliling roda = π.D
251,2 = 3,14. D
D= 251,2/3,14
D= 80
II mencari luas penampang
Luas roda =π.r²
=3,14 . 40²
=5024 cm²
jawabanya C