Advertisements
Advertisements
प्रश्न
In 1975, the consumption of water for human use was about 3850 cu.km/year. It increased to about 6000 cu.km/year in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).
Advertisements
उत्तर
The consumption of water for human in 1975 = 3850 cu km/yr
The consumption of water for human in 2000 = 6000 cu km/yr
Increase in consumption of water in 1975 to 2000 = 6000 – 3850 = 2150 cu km/yr
In percentage = `2150/3850 xx 100 = 55.84%`
In 25 yr total increase in water consumption = 2150 cu km/yr
∴ Annually, i.e. per year water consumption =`2150/25` = 86 cu km/yr ...[∵ 2000 – 1975 = 25 yr]
∴ In percentage = `86/3850 xx 100`
= `8600/3850`
= 2.23%
APPEARS IN
संबंधित प्रश्न
On Sunday 845 people went to the Zoo. On Monday only 169 people went. What is the per cent decrease in the people visiting the zoo on Monday?
Arun bought a car for ₹ 3,50,000. The next year, the price went upto ₹ 3,70,000. What was the percentage of price increase?
Kayal scored 225 marks out of 500 in revision test 1 and 265 out of 500 marks in revision test 2. Find the percentage of increase in her score
Increase of a number from 150 to 162 is equal to increase of ______ per cent.
15% increase in price of an article, which is Rs 1,620, is the increase of Rs ______.
Three times a number is 200% increase in the number, then one-third of the same number is 200% decrease in the number.
If the price of petrol, diesel and LPG is slashed as follows:
| Fuel | Old prices/ litre (in Rs) |
New price/ litre (in Rs) |
% Decrease |
| Petrol / L | 45.62 | 40.62 | ______ |
| Diesel / L | 32.86 | 30.86 | ______ |
| LPG/14.2kg | 304.70 | 279.70 | ______ |
Complete the above table.
What is the percentage increase or decrease in the number of seats won by A, B, C and D in the general elections of 2009 as compared to the results of 2004?
| Political party | Number of seats won in 2004 |
Number of seats won in 2009 |
| A | 206 | 145 |
| B | 116 | 138 |
| C | 4 | 24 |
| D | 11 | 12 |
For an amount, explain why, a 20% increase followed by a 20% decrease is less than the original amount.
