In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
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Question: Problem: the radius of a cylinder is 2 r units and height is 3 r units . find the curved surface ? 
Options: a ) 18 π r 2 , b ) 12 π r 2 , c ) 3 π r 2 , d ) 6 π r 2 , e ) 9 π r 2

Answer: b


Question: Problem: in how many q ways can 5 people from a group of 6 people be seated around a circular table 
Options: ['a ) 56', 'b ) 80', 'c ) 100', 'd ) 120', 'e ) 144']

Answer: e


Question: Problem: each side of a rectangle is increased by 100 % . by what percentage does the area increase ? 
Options: a ) 300 % , b ) 400 % , c ) 500 % , d ) 200 % , e ) 600 %

Answer:
a