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'.

Input: Consider Input: Problem: a can do a work in 24 days and b can do it in 8 days . in how many days a and b can do the work ?
Options: a ) 20 days , b ) 10 days , c ) 6 days , d ) 8 days , e ) 7 days

Output: c

Input: Consider Input: Problem: a train 140 m long running at 84 kmph crosses a platform in 16 sec . what is the length of the platform ?
Options: a ) 287 , b ) 298 , c ) 233 , d ) 726 , e ) 267

Output: c

Input: Consider Input: Problem: a train covers a distance of 15 km in 10 min . if it takes 6 sec to pass a telegraph post , then the length of the train is ?
Options: a ) m , b ) m , c ) m , d ) m , e ) m
Output: c