What is the ratio of radius of incircle and circumcircle for an equilateral triangle with an area of $$22\surd3$$ square units?

Rearrange the following jumbled sentences to make a meaningful one:
P: are inhibiting progress
Q: they look for creative
R: rather than the conventional solution of outsourcing
S: solutions to problems that
The proper sequence should be:

The ratio of the five angles of a pentagon is 2 : 3 : 4 : 4 : 5. What would be the measure of the greatest angle?

The $$CO_2$$ emissions in million metric tons over 3 years are given in the following table.

What is the increase in the percentage of $$CO_2$$ emission from year 2016 to 2017?

A and B together can do a piece of work in 10 days. If A can do the work in 15 days,find in how many days that B alone can do the same work. Given below are the steps involved in solving the above problem. Arrange them in sequential order.

A) One day's work of B is $$\frac{1}{10} - \frac{1}{15}$$

B) One day's work of A and B is $$ \frac{1}{10}$$ and one day's work of A is $$ \frac{1}{15} $$

C) B alone can do the work in 30 days 

D) One day's work of B is $$ \frac{1}{30} $$