Un tren porneste la ora 0:00 merge 4 km cu viteza de 108 km/h, sta un minut in statie, apoi mai merge 8000m cu viteza 72 km/h.
1. Ce distanta a parcurs in total?
2. In cat timp (in cate minute)?
3. Care a fost viteza medie?

va rog rezolvari complete!!!

Răspunsul a fost dat de: USER9177
30 Agustus 2025 fizica 5 minute
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Întrebare

Clasă: Education Materie: fizica
Un tren porneste la ora 0:00 merge 4 km cu viteza de 108 km/h, sta un minut in statie, apoi mai merge 8000m cu viteza 72 km/h.
1. Ce distanta a parcurs in total?
2. In cat timp (in cate minute)?
3. Care a fost viteza medie?

va rog rezolvari complete!!!
Întrebare a fost pusă de:
278 Vezi 278 Răspunsuri

Răspuns (278)

Cel mai bun răspuns
(271)
1) 8000 m= 8 km 
8 km +4 km =12 km
2) 4 km /108 km/h (se simpilica km cu km si se imparte)= 4/108 h= 4/108 x 1000 min = 4000/108= 37 min 
8 km : 772 km/h (la fel)=10 min 
R: 37 min +10 min+ 1 min =48 min 
3) 72 + 4 = 76 km/h
76 : 2= 38 km /h
Răspunsul a fost dat în data 30 Agustus 2025

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