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 chord of a circle of radius ^@ 12 \space cm ^@ subtends a right angle at the center. Find the area of the corresponding minor segment.^@ \bigg[\pi = \dfrac { 22 } { 7 } \bigg] ^@

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 .

The following table shows the distribution of the amount that the families living in a colony spend on groceries per month. Find the mean expenditure of a family on groceries.