In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: two trains t 1 and t 2 start simultaneously from two stations x and y respectively towards each other . if they are 70 km apart both 3 and 6 hours after start , then find the distance between the two stations .
Options: a ) 210 km , b ) 240 km , c ) 220 km , d ) 180 km , e ) 190 km

Output: a

Input: Consider Input: Problem: a train running at the speed of 60 km / hr crosses a pole in 6 sec . what is the length of the train ?
Options: a ) 356 , b ) 278 , c ) 127 , d ) 100 , e ) 150

Output: d

Input: Consider Input: Problem: 6 computers , each working at the same constant rate , together can process a certain amount of data in 9 days . how many additional computers , each working at the same constant rate , will be needed to process the same amount of data in 6 days ?
Options: a ) 3 , b ) 5 , c ) 6 , d ) 9 , e ) 12
Output: a