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.
The radii of two circles are 10cm and 7cm respectively. Find the radius of the circle which has its circumference equal to the sum of the circumference of the two circles.
Jonathan cut a cylindrically shaped solid pipe, having a diameter and height as 4cm and 12cm 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?
Following chart shows number of students in a school who got distinction in one of three subjects. Find the number of students who got distinction in exactly two subjects.