A shopkeeper cheats to the extent of 10% while buying and selling fruits, by using tampered weights. His total gain , in percentage is:

If $$ {x^{2}+3{x}+1=0}$$, then the value of $$ {x^{3}+{1\over {x^{3}}}}$$

The value of $$ {2(1-sin^{2}θ)}+{2(1-cos^{2}θ)}$$. 

Directions :- Refer the graph and answer the given questions.
 The following line graph shows the number of products sold by company A and B during six years.

What is the difference between the total number of products sold by B in 2011, 2012 and 2016 together and the total number of products sold by A in 2011, 2012 and 2013 together?

Simplify $$ \sqrt{(1-sin^{2}θ) ÷(1-cos^{2}θ)}$$.

The average salary of 12 employees in a company was recorded to be ₹20,000. If the salary of the manager is also included, then the average salary increases by ₹2,000. Find the salary of the manager.

The bar chart given below shows the exports (in ₹000) and imports (in ₹000) of a country for 5 consecutive years.

What is the positive difference in the total export figures of all the five years taken together and the total import figures of all the five years taken together?

One side of the rectangular ground is 8m and its diagonal is 17m. Find the area of the ground?