In a class, one-third of students had gone to watch drama. Twice the square root of the students had gone to watch football match, and remaining 36 students had gone to watch museum. Find total number of students in the class.
A sweet is in the shape of a cylinder with two hemispheres stuck to each of its ends. The length of the entire sweet is 21 mm and the diameter of the sweet is 16 mm then choose its correct surface area .