15 menit pertama menempuh jarak 3.0 km, 10 menit kedua menempuh jarak 8,0 km 15 menit ketiga menempuh jarak 30 km maka krlajuan rata rata mobil tersenut adalah

Diket :
Waktu,
t1 = 15 menit = 900 sec
t2 = 10 menit = 600 sec
t3 = 15 menit = 900 sec

Jarak,
S1 = 3,0 km = 3000 m
S2 = 8,0 km = 8000 m
S3 = 30 km = 30000 m

Tanya :
Kelajuan rata-rata, V = __?

Jawab :

V = jarak / waktu
V = (S1 + s2 + s3) / (t1 + t2 + t3)

V = (3000 + 8000 + 30000) / (900 + 600 + 900)

V = (41000) / (2400)

V = 410/24
V = 17,084 m/s

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FZA

15 menit = 3,0 km
10 menit = 8,0 km
15 menit = 30 km

tt = 15 + 10 + 15
tt = 40 menit
tt = 2400 s

st = 3,0 + 8,0 + 30
st = 41 km
st = 41000 m

v = st/tt
v = 41000 m/2400 s
v = 17,08 m/s

Jadi kelajuan rata-rata mobil tersebut adalah 17,08 m/s