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'.

Problem: if a train , travelling at a speed of 180 kmph , crosses a pole in 5 sec , then the length of train is ?
Options: a ) 250 m , b ) 112 m , c ) 117 m , d ) 125 m , e ) 123 m
a

Problem: in a 500 m race , the ratio of the speeds of two contestants a and b is 3 : 4 . a has a start of 155 m . then , a wins by :
Options: a ) 60 m , b ) 20 m , c ) 40 m , d ) 20 m , e ) 23 m
c

Problem: a cistern which could be filled in 10 hours takes 2 hour more to be filled owing to a leak in its bottom . if the cistern is full , in what time will the leak empty it ?
Options: a ) 50 hours , b ) 80 hours , c ) 100 hours , d ) 150 hours , e ) 110 hours
e