Find the exact value of the following question:

$$ (13+2\sqrt{5})^2=?\sqrt{5}+189 $$

If the length of the diagonal AC of a square ABCD is 5.2 cm, then the area of the square is: 

A man rows from J to K (upstream) and back from K to J (downstream) in a total time of 15 hours. The distance between J and K is 300 km. The time taken by the man to row 9 km downstream is identical to the time taken by him to row 3 km upstream. What is the approximate speed of the boat in still water?

An article is sold at a profit of 25 %. If the selling price is doubled, the profit % will be: 

A polygon has 14 sides then find out No. of diagonals in that polygon. 

A number is divided by 6 and 5 is added to this quotient Again sum is divided by 9 and the quotient obtained is 1. Find the number.

Direction: The following diagram shows the percentage of population of Hindus, Sikhs and Muslims with respect to total population in a town during 2005 to 2008. Study the diagram and answer the questions:

If the total number of Hindus in 2008 was 12 lakh, the number of Muslim in 2008 was (in lakh)

How many number are there from 700 to 950 (Including both) which are neither divisible by 3 nor by 7?