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'.
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Question: Problem: a train 50 m long takes 6 sec to cross a man walking at 5 kmph in a direction opposite to that of the train . find the speed of the train ? 
Options: a ) 15 kmph , b ) 25 kmph , c ) 35 kmph , d ) 45 kmph , e ) 55 kmph

Answer: b


Question: Problem: mary can do a piece of work in 28 days . rosy is 40 % more efficient than mary . the number of days taken by rosy to do the same piece of work is ? 
Options: a ) 22 , b ) 24 , c ) 20 , d ) 25 , e ) 27

Answer: c


Question: Problem: in what time will a train 110 m long cross an electric pole , it its speed be 128 km / hr ? 
Options: a ) 2.5 sec , b ) 2.9 sec , c ) 3.1 sec , d ) 8.7 sec , e ) 8.5 sec

Answer:
c