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'.

[EX Q]: Problem: the speed of a train is 120 kmph . what is the distance covered by it in 40 minutes ? 
Options: a ) 50 kmph , b ) 60 kmph , c ) 70 kmph , d ) 80 kmph , e ) 85 kmph
[EX A]: d

[EX Q]: Problem: two trains of equal length , running with the speeds of 60 and 40 kmph , take 36 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ? 
Options: a ) 10 sec , b ) 16 sec , c ) 19 sec , d ) 7.2 sec , e ) 13 sec
[EX A]: d

[EX Q]: Problem: the food in a camp lasts for 40 men for 45 days . if fifteen more men join , how many days will the food last ? 
Options: a ) 80 days , b ) 33 days , c ) 35 days , d ) 16 days , e ) 15 days
[EX A]:
b