Mathematical Ab...

In a class of 135 students, the numbers of boys is twice that of girls. One-sixth of the boys and one-third of the girls failed in the final examination. Find the percentage of students who passed the examination.

The angles of elevations of the top of the tower from two points in the same straight line and at a distance of 9 m and 16 m from the base of the tower are complementary. The height of the tower is:

If ABCD is a square and A, B, C and D are centers of circles and all circles have a radius 2 cm. then find the area of the circle whose center is O.

The angle of depression of a car, standing on the ground, from the top of a 75m tower, is 30^∘. The distance of the car from the base of the tower (in metres) is:

If the focus of a parabola is (−8,−2) and the directrix is y = 2x − 9, then the equation of the parabola is:

Pipe A can fill the tank in 15 min and B can fill the tank in 45 min then in how many minutes both can fill 50% of the tank.

What is the value of cos 46° cos 47° cos 48° cos 49° cos 50° …. cos 135°