Quantitative Aptitude - Arithmetic Ability Questions

On a certain item profit is 150%. If the cost price increases by 25% what will be the new profit margin (in %)?

Radius of base of a hollow cone is 8 cm and its height is 15 cm. A sphere of largest radius is put inside the cone. What is the ratio of radius of base of cone to the radius of sphere?

cos3A is equal to

The sum of twice a number and thrice its reciprocal is 25/2. What is the number?

A trader had 1200 kgs of rice. He sold a part of it at 5% profit and the rest at 11% profit, so that he made a total profit of 7%. How much (in kg) wheat did he sell at 5% profit?

If A's salary is 40% less than that of B, then how much percent is B's salary more than that of A?

A boat goes a certain distance at 40 km/hr and comes back the same distance at 24 km/hr. What is the average speed (in km/hr) for the total journey?

70% of the cost price of a article is equal to the 40% of its selling price. What is the profit or loss percentage?