Subject: mathqa
Question: find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1 : 2 ?
Option: 
A: 2 : 1', 'e ) 2 : 2']
B: 2 : 9', 'd ) 2 : 1', 'e ) 2 : 2']
C: 2 : 2']
D: 1 : 2', 'b ) 2 : 3', 'c ) 2 : 9', 'd ) 2 : 1', 'e ) 2 : 2']
Answer: D