Greatest among the numbers
$$^{3}\sqrt{9},\sqrt{3},\ ^{4}\sqrt{16},\ ^{6}\sqrt{180}$$ is

Directions: The following bar graph shows the percentage breakup of a Sunil’s salary from year 2012 to 2016. With the given information, find the following questions.

Every year there is an increase of 100% in monthly salary as compared to previous year’s monthly salary then what is the ratio of monthly salary in 2016 to the expenses on travelling in 2013.

An article was sold for Rs.4000. Had a discount of 10% was being offered, the profit would have been 20%. The cost price of the article was:

The length, width and height of a room are 10 meters, 8 meters and 6 meters respectively. What will be the largest bamboo length that can be kept in this room?

The ratio of the number of boys and girls in a college is 7 : 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

A train crosses a platform in 30 seconds travelling with a speed of 60 km / h. If the length of the train be 200 metres, then the length ( in metres ) of the platform is 

A clock showing the time of 8 o'clock in the morning. How many degrees will the hour needle rotate in the clock by 2 pm?

The twice of sum of the ages of a father and his son is 8times the age of the son. If the average age of the father and the son is 28 years, what is father's age?