The task is to generate the correct answer for a given math problem.

Problem: the curved surface of a sphere is 64 π cm 2 . find its radius ?
4', 'd ) 9', 'e ) 7'

Problem: if 5 % more is gained by selling an article for rs . 360 than by selling it for rs . 340 , the cost of the article is ?
400

Problem: a metallic sphere of radius 24 cm is melted and drawn into a wire , whose radius of cross section is 16 cm . what is the length of the wire ?

72 c