A diagram shows circles to represent the populations of various countries in the world. The circle for India has a radius of 3.2 cm and the circle for China has a radius of 3.4 cm. If 17% of the world’s population is in India, what percentage of the world’s population is in China?

Question

anonymous · Answer

It is not clear whether the populations are proportional to the radii or to the areas, but I seems they are proportional to the areas, which is to say to the square of the radii. So China's population % should be (17%)(3.4/3.2)^2 = ?