Question

Ajutatima va rog.. Un automobil a parcurs o distanta de 600 km in 7 ore si 30 min.Calculati viteza medie.
Un tren are o viteza medie de 25m/s.Det distanta parcursa in 5 ore.
Un tren are o viteza medie de 30m/s.Determinatiin cat timp parcurge distanta de 1080 km.
Va rog....

Answer 1

1. d=vm*t=>vm=d/t

t=7 h 30 min=7 h+0,5 h=7,5 h

vm=d/t=600/7,5=80 km/h

2. t=5 h=18000 s

d=vm*t=25*18000=450000 m=450 km

3.d=1080 km=1080000 m

d=vm*t=>t=d/vm=1080000/30=36000 s=10 h