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: a pipe can fill a cistern in 33 minutes . find the time in which 1 / 11 part of the cistern will be filled ? 
Options: a ) 5 min , b ) 2 min , c ) 3 min , d ) 1 min , e ) 10 min

A: c
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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
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Q: Problem: if the population of a certain country increases at the rate of 10 person every 60 seconds , by how many persons does the population increase in 1 hour ? 
Options: a ) 100 , b ) 200 , c ) 600 , d ) 800 , e ) 1000

A:
c
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