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: joe needs to paint all the airplane hangars at the airport , so he buys 360 gallons of paint to do the job . during the first week , he uses 1 / 4 of all the paint . during the second week , he uses 1 / 4 of the remaining paint . how many gallons of paint has joe used ? 
Options: a ) 18 , b ) 157 , c ) 175 , d ) 216 , e ) 250
[EX A]: b

[EX Q]: Problem: a train 1500 m long can cross an electric pole in 50 sec and then find the speed of the train ? 
Options: a ) 106 , b ) 107 , c ) 108 , d ) 109 , e ) 110
[EX A]: c

[EX Q]: Problem: a can do a work in 9 days . b can do the same work in 18 days . if both a & b are working together in how many days they will finish the work ? 
Options: a ) 3 , b ) 5 , c ) 4 , d ) 2 , e ) 6
[EX A]:
e