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?

Ratio of the employees in company A to B is 6: 5 and the number of employees in C to A is 13: 10. If the ratio of the number of male to female employees in A, B and C is 7: 5, 2: 3 and 7: 6 respectively, then the number of female employees in all the companies together is approximately what percent of the total number of employees in all the companies together?

If $$\sqrt { 3}=1.732$$ then the find the value of $${9+2{ \sqrt { 3}}}\over  \sqrt { 3}$$  

The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased?

The cost of an article was 75. The cost was first increased by 20% and later on it was reduced by 20%. The present cost of the article is:

Two partners invest 1,25,000 and 85,000 respectively in business and agree that 60 % of the profit should be divided equally between them and the remaining profit is it be treated as interest on capital. If one partner gets 300 more than the other, find the total profit made in the business. 

Bananas are bought at 3 for Rs. 2 and sold at 5 for Rs. 4. Find the gain or loss percent.

Direction: Study the pie chart carefully and answer the given questions. The pie chart shows the percentage breakup of students in different classes from VI to X in the year 2017

What is the difference between the total number of students in class VII and class VIII together to that of the total number of students in class IX and class X together?