Quantitative Aptitude - Arithmetic Ability Questions

Pipes A and B, when working together, can fill an empty tank in 8 hours. If B is stopped after 2 hours, it will take a total of 11 hrs to fill the tank. How long would it take A to fill the empty tank alone?

G is the centroid of the equilateral triangle ABC, if AB = 9cm then AG is equal to

The speed of car B is half the speed of car A. If car A covers a distance of 120 km in 1.5 hours, what is the speed of car B?

Simplify 81x2 - 49y29x + 7y

The diagonals of two squares are in the ratio 5:2.The ratio of their area is

The income of S, T and U are in the ratio of 7 : 9 : 6 and their expenses in the ratio of 4 : 5 : 3. If S saves Rs 2000 out of an income of Rs 14000, then what will be the saving (in Rs) of T?

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

Two successive discounts of 12% and 20% are given by Rajat on a shirt. If the marked price of the shirt is Rs 500, then what is the value (in Rs) of discount?