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'.

[Q]: Problem: ram , who is half as efficient as krish , will take 27 days to complete a task if he worked alone . if ram and krish worked together , how long will they take to complete the task ? 
Options: a ) 16 days , b ) 12 days , c ) 9 days , d ) 6 days , e ) 18 days
[A]: c


[Q]: Problem: walking with 4 / 5 of my usual speed , i arrive at the bus stop 7 minutes later than normal . how many minutes does it take to walk to the bus stop at my usual speed ? 
Options: a ) 12 , b ) 16 , c ) 20 , d ) 24 , e ) 28
[A]: e


[Q]: Problem: 30 men can do a work in 40 days . when should 12 men leave the work so that the entire work is completed in 40 days after they leave the work ? 
Options: a ) 18 days , b ) 10 days , c ) 55 days , d ) 44 days , e ) 22 days
[A]:
a