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Peter runs 200 m in 30 s, while his sister
Eva runs 300 m in 36 s.
a) Who is the faster runner? Explain how
you can tell.
b) At the same rate, how far will each
runner go in 2 min?
c) How long should it take for each
runner to travel 1 km? State any
assumptions that you must make.

Respuesta :

Step-by-step explanation:

Distance / time = rate

Peter speed = 200 m / 30 s = 6.67 m/s

Eva speed    = 300 m / 36 s = 8.33 m/s

b) 2 min = 120 seconds

   distance = rate X time

   Peter =   6.67 m/s  *  120 s = 800 meters

      Eva  = 8.33 m/s * 120 s = 1000 meters

c) assuming they run at constant speed throughout

  1 km = 1000 m

   Distance / rate  =  time

       Peter  1000 m / 6.67 m/s = 150 seconds

        Eva 1000 m / 8.33 m/s = 120 seconds

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