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

Input: Consider Input: Problem: the width of a rectangular hall is ½ of its length . if the area of the hall is 128 sq . m , what is the difference between its length and breadth ? 
Options: a ) 8 m , b ) 10 m , c ) 12 m , d ) 15 m , e ) 17 m

Output: a


Input: Consider Input: Problem: the cost of the paint is rs . 50 per kg . if 1 kg of paint covers 20 sq . ft , how much will it cost to paint outside of a cube having 20 feet each side 
Options: a ) rs . 962 , b ) rs . 6000 , c ) rs . 546 , d ) rs . 876 , e ) none of these

Output: b


Input: Consider Input: Problem: if the radius of a circle is increased by 10 % then the area is increased by : 
Options: a ) 44 % , b ) 120 % , c ) 144 % , d ) 40 % , e ) 21 %


Output: e