Quantitative Aptitude - Arithmetic Ability Questions

The length of the diagonal of a square is 12 cm. Find its area (in cm2).

In a right angled triangle if hypotenuse is 20 cm and ratio of other two sides is 4:3, the length of the sides are

A canal of a village can be cleaned by 24 villagers in 12 days. The number of days in which 36 villagers can clean the canal is ?

Deepak sells all his goods available in his shop at the cost price, but he cheats his customer and gives 20% less goods as he should give. Find his % profit.

If A = 30°, B = 60° and C = 135°, then what is the value of sin3A + cos3B + tan3C – 3sin A cos B tan C?

The mean of 20 observations is 19. One more observation is included and the new mean becomes 20. The 21st observation is

Of the 5 numbers whose average is 76, the first is 3/7 times the sum of other 4. The first number is

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5 km/hr, then the time taken by the boat to travel 100 km with the current is