Quantitative Aptitude - Arithmetic Ability Questions

The angle of elevation of an aeroplane from a point on the ground is 60 deg. After flying for 30 seconds, the angle of elevation changes to 30 deg. If the aeroplane is flying at a height of 4500 m, then what is the speed (in m/s) of aeroplane?

The shadow of a tower on ground level is increased by 30 m, when the angle of depression by the sun changes from 60 deg to 30 deg. The height of the tower is

____ are twin prime numbers.

___ is the point at which the perpendicular bisectors of the sides meet and the center of the circle that circumscribes the triangle is ____.

In a triangle, one of the angles is three times the smallest and another is two times the smallest angle. Calculate the smallest angle.

What is the square root of 576?

What is the fraction which, when taken away from 1/2, gives 2/3?

The angle of depression of the foot of a building from the top of a tower 30 m away is 30 deg. How high is the tower?