A runner ran 2/3 of a 5 kilometer race in 21 minutes. They ran the entire race at a constant speed.a. How long did it take to run the entire race?b. How many minutes did it take to run 1 kilometer?
Accepted Solution
A:
Answer:it take 31.53 minutes to run the entire raceit take 6.3 minutes to run the 1 kmStep-by-step explanation:A runner ran 2/3 of a 5 kilometer race in 21 minutes. They ran the entire race at a constant speed.[tex]\frac{2}{3} \cdot 5= \frac{10}{3}[/tex] 3.33 km is covered in 21 minutesSo 5 km is covered in [tex]\frac{5 \cdot 21}{3.33}=31.53[/tex]minutesit take 31.53 minutes to run the entire race[tex] \frac{10}{3}[/tex] km is covered in 21 minutes1 km is covered in [tex]\frac{21}{\frac{10}{3} } =6.3[/tex]