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: in a garment industry , 12 men working 8 hours per day complete a piece of work in 10 days . to complete the same work in 8 days , working 5 hours a day , the number of men required is : 
Options: a ) 24 , b ) 5 , c ) 6 , d ) 8 , e ) 9
[EX A]: a

[EX Q]: Problem: the length of the bridge , which a train 140 metres long and travelling at 45 km / hr can cross in 30 seconds , is : 
Options: a ) 200 m , b ) 235 m , c ) 245 m , d ) 250 m , e ) 270 m
[EX A]: b

[EX Q]: Problem: a 300 metre long train crosses a platform in 39 seconds while it crosses a post in 18 seconds . what is the length of the platform ? 
Options: a ) 150 m , b ) 350 m , c ) 420 m , d ) 600 m , e ) 700 m
[EX A]:
b