Study the histogram of marks (in Mathematics) distribution of 50 students of class IX and answer the following questions.

Percentage of students who have secured marks more than 59 is

Study the histogram of marks (in Mathematics) distribution of 50 students of class IX and answer the following questions.

The number of students who have scored between 39 and 80 is

Study the histogram of marks (in Mathematics) distribution of 50 students of class IX and answer the following questions.

The average marks of the students are

Study the histogram of marks (in Mathematics) distribution of 50 students of class IX and answer the following questions.

The number of students who have secured marks less than 60 is

The angles of elevation of the top of a tower from two points at a distance of 4 m and 9 m from the base of the tower and in the same straight line with it are complementary. The height of the tower is

Radius of cross section of a solid right circular cylindrical rod is 3.2 dm. The rod is melted and 44 equal solid cubes of side 8 cm are formed. The length of the rod is (Take Π = 22/7)

If θ is positive acute angle and 7cos2Ɵ + 3sin2Ɵ = 4, then the value of θ is

The length of a chord which is at a distance of 12 cm from the centre of a circle of radius 13 cm is