Kecepatan kendaraan 80km/jam lama perjalanan 2 jam 40 menit berapa km jarak tempuh?

tdiketahui:
v: 80 km/jam
t: 2 jam 40 menit

ditanya: s..?

jawab:
s = v × t
s = 80 km/jam × 2 jam 40 menit
s = 80 × (120/60 + 40/60)
s = (80×2) + (40 × 2/3)
s = 160 km + 80/3 km
s = 186,66 km