The radii of two right circular cylinders are in the ratio 3:2 and the ratio of their volumes is 27: 16. What is the ratio of their heights?

$$x+{1\over x}=2$$ and x is real, then the value of $$x^{17}+{1\over x^{19}}$$ is

if $${x\over 9}+{8\over x}=1$$, then the value of x³ is :

By selling an article at 3/4th of the marked price, there is a gain of 25%. The ratio of the marked price and the cost price is-

Directions: The following Pie Chart shows the export of different food grains from India in 2010. Study the chart and answer the questions:

If the revenue from 1 quintal of crop A is thrice that from 1 quintal of crop C, then the ratio of the total revenues of A and C is

Direction: Read the following table carefully and answer the following questions:

Table shows the percentage of male and female employees in different education in a company and total number of males and females:

Find the ratio between the number of female and male employees of postgraduate.

A hemispherical tank full of water is emptied by a pipe at the rate of 7.7 litres per second. How much time (in hours) will it take to empty $$2\over 3$$ part of the tank, if the internal radius of the tank is 10.5 m?

If $${8+2\sqrt{3} \over 3\sqrt{3}+5}=a\sqrt{3}-b$$, then the value of a+b is equal to: