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70)limas segi 4 karena jika dibayangkan jari jari tersebut maka terbantuknya sebuah bangun
71)
b
70. Terdapat dua segitiga dan 3 persegi
= prima Alas segitiga
71.
t = 11.00 - 05.30
t = 5 1/2 jam
s = 330 km
V = s/t
V = 330 /(5 1/2)
V = 330 : 11/2
V= 330 x 2/11
V = 60 km/jam