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jarak yg sudah ditempuh koko dalam 10 menit
= 15 x 10/60
= 15 x 1/6
= 2,5 km
selisih jarak
= 15,5 km - 2,5 km
= 13 km
waktu berpapasan
t = s / (v1 + v2)
t = 13 / (15 + 45)
t = 13/60 jam
t = 13 menit
jadi mereka berpapasan pada pukul
16.10 + 13 menit
= 16.10 + 00.13
= 16.23
Jawaban C