Respuesta :

Answer:

81 kilometers per hour

Step-by-step explanation:

8:00am to 1:00pm is 5 hours

510-105=405

405/5=81

Answer:

H (:

Step-by-step explanation:

So basically, he drove 405km within 5 hours.

How I got that:

510km-105km=405k

8:00am-1:00pm=5 hrs

405 divided by 5 = 81.