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2014-05-20T17:45:05+03:00
Daca distanta are 7 parti => 1 parte = 392 / 7= 56 km, iar 5 parti = 5 * 56 = 280 km.
4h.........280 km
1h...........x km
=> x = (280 * 1) / 4 = 70 km / h
2 5 2