Quantitative Aptitude - Arithmetic Ability Questions

A well of diameter 3 m and depth 14 m is dug. The earth, taken out of it, has been evenly spread all around it in the shape of a circular ring of width 4 m to form an embankment. Find the height of embankment?

Two trains are moving in the same direction at the speed of 35 km/hr and 71km/hr. The time taken by faster train to cross a man sitting in the slower train is 48 seconds. What will be the length (in metres) of the faster train?

If ABCD is a Cyclic Quadrilateral, then the value of Cos2A - Cos2B - Cos2C + Cos2D is

The difference between the ages of mother and son was 21 when mother's age was 43. If father is elder by 3 years to mother, what will be the difference between the ages of son and father when father attains 50 years?

The area of a circle is 38.5 cm2. Find its circumference (in cm).

Length of three line segments isgiven. Is construction of a triangle possible with the segments in the given cases?

If cos(A-B) - cos(A+B) = x, then the value of x is

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of