You are biking at a speed of 18 miles per hour. You are 3 miles behind your friend, who is biking at a speed of 12 miles per hour.

 

You are biking at a speed of 18 miles per hour. You are 3 miles behind your friend, who is biking at a speed of 12 miles per hour. Write and solve an equation to find the amount of time x it takes for you to catch up to your friend.     

 

      Distance to make up  =  3 miles     

      Speed differential       =  6 miles per hour     

 

      Distance  =  Rate times Time    —>>     Time  =  Distance / Rate      

 

                      3 mi     

      Time  =  –––––––  =  0.5 hour     

                      6 ^mi/_hr     

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