Advertisements
Advertisements
प्रश्न
Air is an important inexhaustible natural resource. It is essential for the survival of human beings, microbes, plants, and animals. The following table shows the percentage of various gases in the air.
| Contents of air | Percentage (by volume) |
| Nitrogen | 78 |
| Oxygen | 21 |
| Other (carbon dioxide, inert gases, water vapours, etc.) | 1 |
In 800 m3 of air, calculate the approximate quantities of nitrogen, oxygen, and other gases.
Advertisements
उत्तर
Nitrogen in air = 78%, Oxygen = 21%, Others = 1%
Quantity of air = 800 m3
∴ Quantity of nitrogen in it = 800 of 78%
= `800xx78/100"m"^3`
= 624 m3
∴ Quantity of oxygen = 800 of 21%
= `800xx21/100"m"^3`
= 168 m3
∴ Quantity of other gases = 800 of 1%
= `800xx1/100"m"^3`
= 8 m3
APPEARS IN
संबंधित प्रश्न
Write the following as percent:
\[\frac{14}{625}\]
Express the following as decimal fractions:
7.5%
Find: 22% of 120
Find: 45 is what percent of 54?
The number 12,000 is first decreased by 25% and then increased by 25%. Find the resulting number.
Express the following statement in the percentage form:
13 out of 20
The population of a village decreased by 12%. If the original population was 25,000, find the population after decrease?
A class has 30 boys and 20 girls. Find the percentage of boys in the class.
Find the percentage change from the first quantity to the second:
₹ 80, ₹ 120
How much more per cent seats were won by X as compared to Y in Assembly Election in the state based on the data given below.
| Party | Won (out of 294) |
| X | 158 |
| Y | 105 |
| Z | 18 |
| W | 13 |
