contestada

9. A car has an average speed of 80 km/h for one hour, then an
average speed of 90.0 km/h for two hours during a three-hour
trip. What was the average speed for the three hour trip?

Respuesta :

altavistard

Answer:

86.67 km/hr

Step-by-step explanation:

First Hour:  (80 km/hr)(1 hr)             =  80 km

Next two hours:  (90 km/hr)(2 hr)   =  180 km

Total distance traveled:                   = 260 km

Average speed:  total distance / total time elapsed) = 260 km  /  3 hr

= 86.67 km/hr

Otras preguntas