Quantitative Aptitude - Arithmetic Ability Questions

Convert the 0.0068 in to vulgar fraction:

Mahesh buys a watch of Rs 300 and sells it. Mahesh gives two successive discount of 15% and 6% to the buyer. What will be the selling price (in Rs) ofthe watch?

The sum of the ages of husband and wife at present is 56. Ten years ago the product of their ages was 320. What is the age of the husband and the wife?

A spaceship travels at 810 km/hr. How many metres does it travel in 1/5th of a second?

If the length of the side of an equilateral triangle is 8 cm, what is its area?

The length and breadth of a rectangle are 24 cm and 7 cm respectively. What must be the length of its diagonal (in cm)?

The area of a square is 72.25 cm². Find its perimeter (in cm).

Suresh goes on a trip on his motor-cycle and rides for 410 kms. If he rides for 5 hours at a speed of 50 km/hr, find at what speed he travels for the remaining 4 hours of the journey?