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 250 m long running at 72 kmph crosses a platform in 15 sec . what is the length of the platform ? 
Options: a ) 50 m , b ) 200 m , c ) 250 m , d ) 270 m , e ) 300 m
[EX A]: a

[EX Q]: Problem: a thief goes away with a santro car at a speed of 50 kmph . the theft has been discovered after half an hour and the owner sets off in a bike at 60 kmph when will the owner over take the thief from the start ? 
Options: a ) a ) 2 , b ) b ) 5 , c ) c ) 7 , d ) d ) 5 , e ) e ) 8
[EX A]: a

[EX Q]: Problem: 1000 men have provisions for 20 days . if 650 more men join them , for how many days will the provisions last now ? 
Options: a ) 12.9 , b ) 12.5 , c ) 12.6 , d ) 12.2 , e ) 12.1
[EX A]:
e