1 kilometre=1000 metre
       1 hour = 3600 second
        
        
The initial velocity of car A is 35.0 km/hr i.e
                                          
                                                                    = 9.72 m/s
The initial velocity of car B is 45 km/hr =12.5 m/s
The initial velocity of car C is 32 km/hr = 8.89 m/s
The initial velocity of car D is 110 km/hr=30.56 m/s
The acceleration of car A is given as  
                                             
                                             
The time taken by car A = 15 min.
From equation of kinematics we know that-
                                  v= u+at      [Here v is the final velocity and a is the acceleration and t is the time]
 Final velocity of A,  v = 9.72 m/s +[0.00192901234×15×60]m/s
                                    =11.456111106 m/s
The acceleration of B is given as    
                                     
The time taken by car B =20 min
The final velocity of B is -
                              v= u+at
                                = u-at    [Here a is negative due to deceleration]
                                =12.5 m/s +[0.0011574074074×20×60]
                                =13.8888888.....
                                =13.9
The acceleration of C is given as     
           
                                                             
The time taken by car C =30 min
The final velocity of C is-
                                 v = u+at
                                    =8.89 m/s+[0.003086419753×30×60] m/s
                                    =14.4455555555..m/s
                                    =14.45 m/s
The car C is decelerating.The deceleration is given as-  
                                                                       
The time taken by car D= 45 min.
The final velocity of the car D is-
                      v =u+at
                         =30.56 -[0.00462962962962×45×60]m/s
                         =18.06 m/s
Hence from above we see that the magnitude of final velocity car C and B is close to 15 m/s. The car C is very close as compared to car B.