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: 8 men can do a piece of work in 12 days . 4 women can do it in 48 days and 10 children can do it in 24 days . in how many days can 6 men , 4 women and 10 children together complete the piece of work ? 
Options: a ) 5 days , b ) 15 days , c ) 28 days , d ) 8 days , e ) 7 days
[EX A]: d

[EX Q]: Problem: the sum of 4 consecutive even numbers is 140 . what would be the smallest number ? 
Options: a ) 32 , b ) 88 , c ) 70 , d ) 123 , e ) 12
[EX A]: a

[EX Q]: Problem: a train 250 m long running at 72 kmph crosses a platform in 30 sec . what is the length of the platform ? 
Options: a ) 350 m , b ) 200 m , c ) 250 m , d ) 270 m , e ) 300 m
[EX A]:
a