Materi : Jarak, Kecepatan, dan Waktu
Jarak = 8 km
8 km - 180 detik/1 jam × 48 km
= 8 km - 3 menit/60 menit × 48 km
= 8 km - 1/20 × 48 km
= 8 km - 2,4 km
= 5,6 km
---
5,6 km/504 detik
= 1 km/90 detik
= 1/90 km/detik
= ( 1/90 × 3.600 ) km/jam
= ( 1/9 × 360 ) km/jam
= 40 km/jam { c. }
8 km - 6 menit/1 jam × 45 km
= 8 km - 6 menit/60 menit × 45 km
= 8 km - ⅒ × 45 km
= 8 km - 4,5 km
= 3,5 km
3,5 km/288 detik
= 7 km/576 detik
= ( 7/576 × 3.600 ) km/jam
= 43,75 km/jam { b. }
Kec.Awal = 50 km/jam
Kec.Akhir = 54 km/jam [ 540 menit = 9 menit ]
8 km/9 menit = 54 km/jam
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
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Verified answer
Materi : Jarak, Kecepatan, dan Waktu
Jarak = 8 km
Soal Nomor 1
8 km - 180 detik/1 jam × 48 km
= 8 km - 3 menit/60 menit × 48 km
= 8 km - 1/20 × 48 km
= 8 km - 2,4 km
= 5,6 km
---
5,6 km/504 detik
= 1 km/90 detik
= 1/90 km/detik
= ( 1/90 × 3.600 ) km/jam
= ( 1/9 × 360 ) km/jam
= 40 km/jam { c. }
Soal Nomor 2
8 km - 6 menit/1 jam × 45 km
= 8 km - 6 menit/60 menit × 45 km
= 8 km - ⅒ × 45 km
= 8 km - 4,5 km
= 3,5 km
---
3,5 km/288 detik
= 7 km/576 detik
= ( 7/576 × 3.600 ) km/jam
= 43,75 km/jam { b. }
Soal Nomor 3
Kec.Awal = 50 km/jam
Kec.Akhir = 54 km/jam [ 540 menit = 9 menit ]
8 km/9 menit = 54 km/jam
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]