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Observe the motion of a car as shown in the figure and answer the following questions:
 
1.jpg
 
Compare the distance covered by the car through the path ABC and AC. What do you observe?
 
Which path gives the shortest distance to reach D from A?
  
Is it the path ABCD or the path ACD or the path AD?
   
1. Distance covered by the car through the path ABC - 
  
2. Distance covered by the car through the path AC - 
 
3. Which path gives the shortest distance to reach D from A? 
 
4. The shortest distance to reach D from A will be .