Pleaseeeee helpppp! No links, show work and I’ll give brainliest

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.