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 , b and c can complete a piece of work in 24 , 6 and 12 days respectively . working together , they will complete the same work in : 
Options: a ) 33 / 7 , b ) 43 / 7 , c ) 24 / 7 , d ) 19 / 7 , e ) none
[EX A]: c

[EX Q]: Problem: 42 persons can repair a road in 12 days , working 5 hours a day . in how many days will 30 persons , working 6 hours a day , complete the work ? 
Options: a ) 10 , b ) 16 , c ) 13 , d ) 14 , e ) 19
[EX A]: d

[EX Q]: Problem: if 6 men can colour 48 m long cloth in 2 days , then 2 men can colour 36 m long cloth in 
Options: a ) 1 day , b ) 2.1 days , c ) 3 days , d ) 4.5 days , e ) 5 days
[EX A]:
d