Quantitative Aptitude - Arithmetic Ability Questions

In ΔDEF measure of angle E is 90 deg. If cotD = 8/15, and DE = 16cm, then what is the length (in cm) of side EF?

If tanα = 2 - 1, then the value of  tanα - cotα = ?

Square root of 0.9 is equal to

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 metres, then the speed of the aeroplane in km/hr. is

Slope of the line AB is 4/3. Co-ordinates of points A and B are (x , -5) and (2 , -3) respectively. What is the value of x?

The lengths of the two diagonals of a rhombus are 7 cm and 24 cm. Find the length of its perimeter (in cm).

The bar graph shows the annual sales of the different departments of a company. Study the diagram and answer the following questions

What is the ratio of the annual sales of department B to that of department F?

If selling price and cost price of an article are Rs. 684.25 and Rs. 595 respectively, then what is the profit percentage?