Quantitative Aptitude - Arithmetic Ability Questions

A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60 deg. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

A right circular cylinder is partially filled with water. Two iron spherical balls are completely immersed in the water so that the height of the water in the cylinder rises by 4 cm. If the radius of one ball is half of the other and the diameter of the cylinder is 18 cm, then the radii of the spherical balls are

If the diameter of a sphere is 14 cm, then what is the surface area (in sq.cm) of the sphere?

What number, from the following should be deducted from 1184 to make it exactly divisible by 21?

The compound interest on Rs. 1000 at 10% per annum for 3 years in (Rs.) is

What is the value of [tan (90 – A) + cot (90 – A)]2/[2 sec2(90 – 2A)]?

Find out the odd word/letters/number/number pair from the given alternatives.