Question

Distanta d= 79,2 km este parcursa de un mobil in intervalul de timp de 1 h si 6 minb. Exprimati viteza mobilului in km/h si in m/s.

Answer 1

1 h si 6 min=1,1 h
v=d\t=79,2:1,1=72 km\h
79,2km=79200m
1,1 h=66min=66×60=3960s
v=79200:3960=20m/s

Answer 2

v=d/t;
d=79,2km=79200m
t=1h 6min=3600s+6×60s=3600+360=3960s
v=79200m/3960s=20m/s
v=20m/s=20×3,6=72km/h