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: if 22 men do a work in 55 days , in how many days will 10 men do it ? 
Options: a ) 121 , b ) 123 , c ) 119 , d ) 125 , e ) 127

Output: a


Input: Consider Input: Problem: a train 385 meters long is running with a speed of 60 kmph . in what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going ? 
Options: a ) 5 , b ) 21 , c ) 7 , d ) 8 , e ) 9


Output: b