I'm pretty sure the speaker or narrator is the poet.
<span>Echoes of Greek architecture can be seen in Washington, D.C. The
White House itself, as well as the Lincoln Memorial, is an example of this. In addition to the influence of Greek
architecture, the nation’s capital has many buildings inspired by the Romans
and the Egyptians. Other government
buildings and structures in the US also echo these influences.</span>
Answer:
(up) 10 km/hr, (down) 40 km/hr, (total) 16 km /hr
Explanation:
They went 40 km in 2.5 hours (20 km in 2 hours up, 20 km in 0.5 hrs down), so for the total trip his average speed was: 40 km/2.5hrs or 16 km/hr. Going up the hill their average time was 20 km/2hrs or 10 km/hr. Going down the hill their average speed was 20 km/0.5hrs or 40km/hour