Quantitative Aptitude - Arithmetic Ability Questions

If xy = 56 and x2+ y2= 113, then what will be the value of (x + y)?

If cosec 240° = x, then the value of x is

1/(tanA + cotA) is equal to

Three years from now Dharitri's age will be eight years less than twice Eunice's age. The sum of their present ages is 61 years. What is Dharitri's present age?

A batsman makes 100 runs in the 25th match of his career. His average runs per match increases by 1.4. Find his average before the 25th match.

A gun is fired at a distance of 6.64 km away from Ram. He hears the sound 20 seconds later. Then the speed of sound is

1/4 of 12?

When a discount of 20% is given on a jacket, the profit is 28%. If the discount is 13%, then the profit is