Quantitative Aptitude - Arithmetic Ability Questions

A train travelling at 76 kmph crosses a 450 m long platform in 27 seconds. What is the length of the train?

Dipali bought a set of cups for Rs. 375, but then had to sell it later to clear old stocks for Rs. 345. What is the percentage of loss that she incurred?

The ratio of present ages of Ratnabali and Shaukat is 8:5. After 22 years the ratio of their ages will be 10:9. At present, what is Ratnabali's age?

The average cost of 5 items in a shopping list is Rs 650. If one more item whose cost is Rs 1400 is added to the list what will be the new average (in Rs)?

A circle and a square have same area. The ratio of the side of the square to the radius of the circle will be:

What is the value of (3/5 + 7/9)?

ΔDEF is right angled at E. If secD = 25/7, then what is the value of cosecF ?

If (1 -­ cosA)/(1 + cosA) = x, then the value of x is