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

Problem: one side of a rectangle is 3 cm shorter than the other side . if we increase the length of each side by 1 cm , then the area of the rectangle will increase by 16 cm 2 . find the lengths of all sides . 
Options: a ) 10 and 3 , b ) 9 and 6 , c ) 10 and 7 , d ) 3 and 10 , e ) 10 and 10
b

Problem: which is the smallest no which divides 2880 and gives a perfect square ? 
Options: ['a ) 4', 'b ) 9', 'c ) 3', 'd ) 5', 'e ) 7']
d

Problem: the radius of a cylindrical vessel is 7 cm and height is 5 cm . find the whole surface of the cylinder ? 
Options: a ) 281 , b ) 528 , c ) 440 , d ) 767 , e ) 1981

b