World’s population less than Web addresses

Internet is growing in dimensions every second, so much so that there are more addresses than there are people on Earth.The number of web pages at “over 1 trillion”, while Google had earlier indexed more than one trillion discreet web addresses.

The current global population stands at more than 6.7 billion, which means that there are about 150 web addresses per person in the world.
And this could mean that if a person spent just one minute reading every website in existence, then he or she would be kept busy for 31,000 years, without any sleep.

An average person would need 600, 000 decades of non-stop reading to read through the information.Approximately 1.46 billion people worldwide now use the internet which represents a solid 16 per cent increase from the previous year’s estimate (1.26 billion in 2007).

The largest Internet population belongs to China, with 338 million users online, which are more than there were people in the US.However InternetWorldStats.com (IWS), a website that combines multiple data sources, has claimed that China’s online population is more like 298 million.

With the rates of India and China still quite low, there is sufficient room for growth in the coming decade.
But, measuring the online population could be tricky-there are servers, users, per capita numbers and penetration percentages to evaluate.And thus it is difficult to find a single figure to represent the world online population.

IWS combined data from the UN’s International Telecommunications Union, Nielsen Online, GFK and US Census Bureau, and its latest global figures puts the number of internet users in the world at 1,596,270,108.

And this is just 23.8 per cent of the estimated 6, 0706,993,152 people in the world. But it changes every day.In terms of the future, we anticipate mobile to contribute significantly to internet usage.

According to IWS, the top 5 countries with the most internet users are:
1 – China (298,000,000 users, or 22.4 percent of their population)
2 – US (227,190,989, or 74.7 percent)
3 – Japan (94,000,000, or 73.8 percent)
4 – India (81,000,000, or 7.1 percent)
5 – Brazil (67,510,400, or 34.4% percent)

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Maths Work sheet 5

Trigonometry Revision sums

1. A man standing on the deck of a ship, which is 8m above water level. He observes the angle of elevation of the top of a hill as 60` & the angle of depression of the base of the hill as 30`. Calculate the distance of the hill from the ship and the height of the hill.

2. The angle of elevation of a jet plane from a pt ‘a’ on the ground is 6o`. After a flight of 15 sec, the angle of elevation changes to 30`. If the jet plane is flying at a constant height of 1500 * 1.73 (1500 x root 3), find the speed of the jet plane.

3. A person standing on the bank of river observes that the angle of elevation of the top of the tree standing on the opposite bank is 60`. When he moves 40m away from the bank, he finds the angle of elevation to be 30`. Find the height of the tree and the width of the river.

4. The angle of elevation of the top Q of a tower PQ from a point X on the ground is 60`.At a point Y , 40m vertically above X the angle of elevation is 45`. Find the height of the tower PQ and the distance XQ.

5. A man on the deck of a ship is 16m above water level. He observes that the angle of elevation of the top of a cliff is 45` & the angle of depression of the base is 30`. Calculate the distance of the cliff from the ship & the height of the cliff.

Maths Work sheet 4

Math’s worksheet – linear equations

1. Find 2 no.s whose sum is 108 and difference is 24.

2. Sum of two numbers is 120. 3 times the greater is equal to 5 times the smaller. Find them.

3. 2 numbers are in the ratio 3:4. I f the former is increased by 10 & the latter decreased by 20, and then the former will be double the later. Find them.

4. A certain no. of 2 digits is 3 times the sum of its digit & if 45 be added to it the digits get reversed. Find the number.

5. A 2 digit no. is obtained either by multiplying sum of its digits and adding or multiplying the difference in the digits by 24 & adding 2 to it. Find the number.

6. 10 years ago a father was twice as old as his son. 10 years hence, father will be 1 and a half times as old as his son. Find their present ages.

7. A bag contains 94 coins of 50 paisa and 25 paisa denominations. If the total worth of these coins is Rs29.75. find the no. of coins in each kind.

8. 2 men and 7 boys can do a piece of work in 4 days. The same work is done in 3 days by 4 men and 4 boys. How long will it take for I man and 1 boy to do it.