An athlete completes one round of a circular track of diameter 49 m in 20s . Calculate the distance covered and displacement at th

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1. Answer:

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   Time taken to complete one round = 20s
   

   So,total rounds completed in 30s = 30/20 = 3/2 = 1.5
   

   
   

   Given:diameter = 49
   

   therefore radius = 49/2 and pi = 3.14
   

   Now distance travelled in one round = 2*pi*r = 2*3.14*49/2
   

   = 3.14*49 = 153.86
   

   
   

   thus,total distance travelled in 30s = 1.5*153.86 = 230.79m
   

   
   

   To find the displacement,
   

   the shortest distance between initial and final position in diameter = 49m
   

   
   

   therefore displacement of an athlete completes one round of a circular track = 49m
   

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