If the southern hemisphere contains 10 percentland and the northern hemisphere
contains 40 percent land, what percentof Earth is land?
10% of 1/2 + 40% of 1/2 = 5% + 20% = 25%
To find out what percent of Earth is land, we need to calculate the percentage of land in both the southern and northern hemispheres and then take the average.
Let's start with the southern hemisphere, which contains 10 percent land. This means that if we divide the southern hemisphere into 100 equal parts, 10 parts would be land.
Next, let's move to the northern hemisphere, which contains 40 percent land. Similar to the southern hemisphere, if we divide the northern hemisphere into 100 parts, 40 parts would be land.
To calculate the percentage of land for the entire Earth, we need to find the average of the percentages from both hemispheres. We can do this by adding the percentage of land in the southern hemisphere (10 percent) and the percentage of land in the northern hemisphere (40 percent).
10 percent + 40 percent = 50 percent
Thus, 50 percent of Earth is land.