instruction:
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'.
question:
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 .
answer:
b


question:
Problem: convert 0.35 in to a vulgar fraction ? 
Options: a ) 18 / 50 , b ) 16 / 50 , c ) 7 / 20 , d ) 19 / 50 , e ) none
answer:
c


question:
Problem: the sector of a circle has radius of 35 cm and central angle 135 o . find its perimeter ? 
Options: a ) 91.5 cm , b ) 92.2 cm , c ) 152.5 cm , d ) 29.2 cm , e ) 98.2 cm
answer:

c