Task: Question Answering
Input (English): Problem: two trains are moving in the same direction at 72 kmph and 36 kmph . the faster train crosses a man in the slower train in 27 seconds . find the length of the faster train ? 
Options: a ) 270 m , b ) 189 m , c ) 278 m , d ) 279 m , e ) 917 m
Output (English): a