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 and b together do a work in 20 days . b and c together in 15 days and c and a in 12 days . so a , b and c together finish same work in how many days ? 
Options: a ) 12 , b ) 15 , c ) 8 , d ) 10 , e ) 11

Output: d


Input: Consider Input: Problem: two trains of equal length are running on parallel lines in the same direction at 46 km / hr and 36 km / hr . the faster train passes the slower train in 27 seconds . what is the length of each train ( in meters ) ? 
Options: a ) 50.5 , b ) 88.5 , c ) 37.5 , d ) 55.5 , e ) 23.5

Output: c


Input: Consider Input: Problem: if 8 men or 12 women can do a piece of work in 30 days , in how many days can the same work be done by 6 men and 11 women ? 
Options: a ) 10 days , b ) 11 days , c ) 13 days , d ) 15 days , e ) 18 days


Output: e