In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
--------
Question: Problem: the slant height of a cone is 21 cm and radius of the base is 10 cm , find the curved surface of the cone . 
Options: a ) 330 , b ) 770 , c ) 660 , d ) 100 , e ) 600

Answer: c


Question: Problem: the perimeter of one face of a cube is 32 cm . its volume will be : 
Options: a ) 125 cm 3 , b ) 400 cm 3 , c ) 512 cm 3 , d ) 625 cm 3 , e ) none of these

Answer: c


Question: Problem: the length of a rectangle is increased by 25 % and its breadth is decreased by 15 % . what is the effect on its area ? 
Options: a ) 1288 , b ) 1299 , c ) 10625 , d ) 10000 , e ) 2887

Answer:
c