Quantitative Aptitude - Arithmetic Ability Questions

If X + Y = 19 and X - Y = 7, then XY = ?

Two poles of the height 15 m and 20 m stand vertically upright on a plane ground. If the distance between their feet is 12 m, find the distance between their tops.

The number of diagonals in a pentadecagon is

A cylindrical vessel of height 7 cm and radius 5 cm is completely filled with sand. When this sand is poured out it forms a right circular cone of radius 8 cm what will be the height of this cone?

If the in radius of the equilateral triangle is 8 cm then what is the value of circum radius (in cm) of the triangle?

The square root of 5184 is

Find the in-radius (in cm) of an equilateral triangle whose sides are 6 cm each.

A telegraph post is bent at a point above the ground. Its top just touches the ground at a distance of 8√3 m from its foot and makes an angle of 30° with the horizontal. The height (in metre) of the post is