Question

Daca o masina merge cu90 de km /h Cati km parcurge in 10 min. Dar in 23 de min?

Answer 1

90 km/h = 90 000 m / 3600 s = 25 m/s ;10 min = 10* 60 = 600 s ; 23 min=1380s
V = d / t 
25 m/s = d / 600s
d = 25*600 = 15 000 m = 15km

25m/s = d / 1380s
d = 25 * 1380 = 34 500 m = 34,5 km

Answer 2

1 ora = 60 min
90 : 60 =1 ,5km/min
1,5 x 10 = 15 km parcurge in 10 minute 
1,5 x 23= 34,5 km parcurge in 23 minute