tolong dijawab pke cara ya.makasih:)

18. kecepatan = jarak : waktu
= 08.45 - 06.30
= 02.15

= 02.15
= 2 15/60 jam

= 90 km : 2 15/60 jam
= 90 km : 135/60 jam
= 90 km x 60/135 jam
= 40 km/jam

19. debit = volume : waktu
= 2 m : 15 menit
= 2 m : 15/60 jam
= 2 m x 60/15 jam
= 8 jam






*semoga bermanfaat*