4. A car travels for 1 1/2 hours with a constant speed of 65 km/h and then travels

for 45 minutes with a constant speed of 80 km/h. What distance did the vehicle

cover?

157.5 km

Step-by-step explanation:

speed = distance/time

distance = speed * time

Distance traveled at 65 km/h

1 1/2 hours = 1.5 hours

1 1/2 hours at 65 km/h

distance = speed * time

distance = 65 km/h * 1.5 h = 97.5 km

Distance traveled at 80 km/h

45 mn = 45 mn * (1 h) / (60 mn) = 0.75 h

45 minutes at 80 km/h

distance = speed * time

distance = 80 km/h * 0.75 h = 60 km

Total Distance:

97.5 km + 60 km = 157.5 km