yg belum di silang tolong dijawabnya sebisanya

18. j = 60 km
w = 1 jam 30 menit= 1 1/2 jam
k= 60 : 1 1/2 = 60 : 3/2 = 60 x 2/3 = 40 km/jam

Maaf baru bisa jawab 1