$$ {3sin60°-4sin^{3}60°=?}$$

Average of 21 number is 36. If the average of first 12 numbers is 15, then find the average of remaining 9 number?

$$ {\sqrt{8\ {^{3}\sqrt{729}}}=?}$$

Direction: The following table represents the number of items sold by four divisions of a consumer goods dealer during 2010 to 2013.

The combined sales figures in 2011 and 2013 of which division was the lowest?

The covered surface area of  a cone of radius 8 cm and height 6 cm is double the covered surface area of a cylinder of radius 4 cm. Find the height of the cylinder?

If the circumradius of an equilateral triangle ABC is 8 cm, then what is the height of the triangle?

Directions: The bar chart given below shows the percentage distribution of the production of various models of a mobile manufacturing company in 2007 and 2008. The total production in 2007 was 35 lakh mobile phones and in 2008 the production was 44 lakh. Study the chart and answer the following questions.
Percentage of six different types of mobiles manufactured by a company over two year

Total number of mobiles of models A, B and E  manufactured in 2007 was 

Two trains are moving in the same direction at 75 km/hr. and 48 km/hr. The faster train crosses a man sitting in the slower in 14 second. Find the length of the faster train?