# Tropical, mild and arctic

How many percents of the Earth's surface lies in the tropical, mild and arctic range? The border between the ranges is the parallel 23°27 'and 66°33'.

Result

p1 =  8.259 %
p2 =  51.946 %
p3 =  39.795 %

#### Solution:

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

## Next similar examples:

1. Hemispherical hollow
The vessel hemispherical hollow is filled with water to a height of 10 cm =. How many liters of water are inside if the inside diameter of the hollow is d = 28cm?
2. Three workshops
There are 2743 people working in three workshops. In the second workshop works 140 people more than in the first and in third works 4.2 times more than the second one. How many people work in each workshop?
3. Blocks
There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there?
4. Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones?
5. Confectionery
The village markets have 5 kinds of sweets, one weighs 31 grams. How many different ways a customer can buy 1.519 kg sweets.
6. Earth's surface
The greater part of the earth's surface (r = 6371 km) is covered by oceans; their area is approximately 71% of the Earth's surface. What is the approximate area of the land?
7. Fit ball
What is the size of the surface of Gymball (FIT - ball) with a diameter of 65 cm?
8. Profit gain
If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is:
9. Borrowing
I borrow 25,000 to 6.9% p.a.. I pay 500 per month. How much will I pay and for how long?
10. The city
At the end of 2010 the city had 155000 residents. The population increased by 2.1% each year. What is the population at the end of 2013?
11. A perineum
A perineum string is 10% shorter than its original string. The first string is 24, what is the 9th string or term?
12. Percentages
52 is what percent of 93?
13. Theorem prove
We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
14. Reference angle
Find the reference angle of each angle:
15. Sequence
Write the first 7 members of an arithmetic sequence: a1=-3, d=6.
16. Sequence
Write the first 6 members of these sequence: a1 = 5 a2 = 7 an+2 = an+1 +2 an
17. AP - simple
Determine the first nine elements of sequence if a10 = -1 and d = 4