In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: the area of a rectangular plot is 18 times its breadth . if the difference between the length and the breadth is 10 metres , what is its breadth ? 
Options: a ) 10 metres , b ) 8 metres , c ) 7.5 metres , d ) data inadequate , e ) none of these
[EX A]: b

[EX Q]: Problem: the length and breadth of a rectangle is increased by 10 % and 30 % respectively . what is the increase in the area ? 
Options: a ) 43.0 , b ) 44.0 , c ) 43.5 , d ) 45.0 , e ) 42.0
[EX A]: a

[EX Q]: Problem: what is the measure of the radius of the circle that circumscribes a triangle whose sides measure 3 , 4 , and 5 ? 
Options: a ) 3.5 , b ) 3 , c ) 5 , d ) 4 , e ) 2.5
[EX A]:
e