Quantitative Aptitude - Arithmetic Ability Questions

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 :

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

x and y are two numbers such that their mean proportion is 16 and third proportion is 128. What is the value of x and y?

In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 8 cm, 6 cm and 7.2 cm respectively, find length of BC?

Choose the word is least like the other words in the group

If 2x + 6y = 3xy and 10x -­ 3y = 4xy, find x, y.

A trader buys 800 kgs of tomatoes for Rs 7200. 10% tomatoes are damaged in transportaion. At what rate (Rs/Kg) should he sell the rest to earn 30% profit?

A sum of Rs 4000 becomes Rs 6000 in 1 year at a certain rate of compound interest. What will be the sum (in Rs) after 4 years?