Two trains, Train A and Train B crosses each other completely in 18 sec while travelling in opposite directions, speed of train A is 72 km/hr and speed of train B is 54 km/hr. Moreover, length of train A is 170 m less than the length of train B. Which of the following values we can get from the above given conditions. 
a) Length of train A 
b) Time taken by train B to cross a pole 
c) Time taken by train A to cross platform of length 233 m 
d) Initial distance between both the trains.