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: a train of 25 carriages , each of 60 meters length , when an engine also of 60 meters length is running at a speed of 60 kmph . in what time will the train cross a bridge 1.0 km long ? 
Options: a ) 2.5 , b ) 3 , c ) 5 , d ) 7 , e ) 9
[EX A]: a

[EX Q]: Problem: a certain car uses 12 gallons of gasoline in traveling 180 miles . in order for the car to travel the same distance using 10 gallons of gasoline , by how many miles per gallon must the car ’ s gas mileage be increased ? 
Options: a ) 2 , b ) 3 , c ) 6 , d ) 8 , e ) 10
[EX A]: b

[EX Q]: Problem: a train 280 m long is running at 70 kmph . in how much time will it pass a platform 210 m long ? 
Options: a ) 1.5 seconds , b ) 9.56 seconds , c ) 28.56 seconds , d ) 30.56 seconds , e ) 3.5 seconds
[EX A]:
b