Respuesta :

Explanation:

Average speed of a body in motion is the rate of change of distance per unit of time.

 This is expressed as;

          Average speed  = [tex]\frac{Distance }{time}[/tex]  

1. Distance  = 5000m

    Time  = 50s

      Average speed  = [tex]\frac{5000}{50}[/tex]   = 100m/s

2. Distance  = 300m

   Time  = 100s

      Average speed  = [tex]\frac{300}{100}[/tex]   = 3m/s

3. Distance  = 550m

   Time  = 120s

   Average speed  =  [tex]\frac{550}{120}[/tex]   = 4.58m/s