Arunner ran constant speed.
of a 5 kilometer race in 21 minutes. They ran the entire race at a
a. How long did it take to run the entire racer
b. How many minutes did it take to run 1 kilometer?

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict