Hunk travelled 540 km at an average speed of 90 km/h. If Tim

completed the same amount of distance with 1 hour and 30 min less

than Hunk, what was Tim's average speed for the whole journey?

km/h

120 km/h

Step-by-step explanation:

Hi, to answer this question, first, we have to calculate Hunk's time spent on his travel.

Speed rate = distance /time

Time = distance /speed = 540/ 90 =6 hours

Now, since Tim completed the same amount of distance with 1 hour and 30 min less (1.5) we have to subtract 1.5 hours to Hunk's time to calculate Tim’s time:

6-1.5 = 4.5 hours

Tim's speed rate = distance /time

s = 540/4.5 = 120 km/h

Feel free to ask for more if needed or if you did not understand something.  

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.