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'.

[Q]: Problem: the distance between west - town to east - town is 20 kilometers . two birds start flying simultaneously towards one another , the first leaving from west - town at a speed of 4 kilometers per minute and the second bird , leaving from east - town , at a speed of 1 kilometers per minute . what will be the distance , in kilometers , between the meeting point and west - town ?
Options: a ) 3 . , b ) 7 . , c ) 10 . , d ) 16 . , e ) 15 .
[A]: d

[Q]: Problem: if 36 men can do a piece of work in 25 hours , in how many hours will 12 men do it ?
Options: a ) 22 , b ) 38 , c ) 60 , d ) 88 , e ) 75
[A]: e

[Q]: Problem: a train leaves delhi at 9 a . m . at a speed of 30 kmph . another train leaves at 2 p . m . at a speed of 40 kmph on the same day and in the same direction . how far from delhi , will the two trains meet ?
Options: a ) 900 km , b ) 800 km , c ) 600 km , d ) 690 km , e ) 609 km
[A]:
c