Quantitative Aptitude - Arithmetic Ability Questions

A train of length 100 m crosses another train of length 150 m, running on a parallel track in the opposite direction in 9 seconds. If the speed of trainhaving length 150 m is 40 km/hr, then what is the speed (in km/hr) of the other train?

If x/y = 4/9, then what is the value of (7x2 – 19xy + 11y2)/y2 ?

The side of an equilateral triangle is 14 cm. Find its area (in sq.cm).

The population of a town is 200000. It increases annually at the rate of 10%. What will be the population after 2 years?

What is the effective discount on two successive discounts of 20% and 25%?

A moving train passes a platform 50m long in 14 seconds and a lamp post in 10 seconds. The speed of the train (in km/h) is :

Deepanshu lent Rs. 8400 to Jaipal for 15 years and Rs. 5100 to Kareem for 14 years on simple interest at the same rate of interest and received Rs. 17766 in all from both of them as interest. The rate of interest per annum is

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is