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: if 20 men can build a wall 112 metres long in 6 days , what length of a similar wall can be built by 30 men in 3 days ? 
Options: a ) 65 mtr . , b ) 84 mtr , c ) 70 mtr . , d ) 78 mtr . , e ) 17 mtr .
[A]: b


[Q]: Problem: p can do a work in the same time in which q and r together can do it . if p and q work together , the work can be completed in 10 days . r alone needs 30 days to complete the same work . then q alone can do it in 
Options: a ) 10 , b ) 22 , c ) 25 , d ) 27 , e ) 30
[A]: e


[Q]: Problem: if in a race of 130 m , a covers the distance in 20 seconds and b in 25 seconds , then a beats b by : 
Options: a ) 20 m , b ) 26 m , c ) 11 m , d ) 10 m , e ) 15 m
[A]:
b