In a class, one-fourth of students had gone to watch magic show. Twice the square root of the students had gone to watch museum, and remaining 160 students had gone to watch football match. Find total number of students in the class.
Jonathan cut a cylindrically shaped solid pipe, having a diameter and height as ^@ 4 \space cm ^@ and ^@ 12 \space cm ^@ respectively, into ^@4^@ equal parts. He then took a piece and rolled it into ^@2^@ similar balls. What would be the radius of the ball^@?^@