How Much Water Do We Use|Use Of Water|Source Of water|OMR

A mixture of 30 litres of spirit and water contains 20% of water in it. How much water must be added to it, to make the water 25% in the new mixture ?

We use water in-

Water potential is used to measure

Read the paragraph and answer the questions following it. Water is essential for life. Without water there would be no life. We usually take water as granted for its purity, but we must ensure the quality of water. Pollution of water originates from human activities. Through different paths, pollution reaches to ground water. Easily identified source or place of pollution is called as point source, e.g.– municipal and industrial discharge pipes, where pollutants enter the water source. Non–point sources of pollution are those where a source of pollution can not be easily identified, e.g.– agricultural run off, acid rain etc. (i) How do you classify the various sources of water pollution? (ii) What are the point sources of water pollution? (iii) Name any two non-point sources of water pollution?

Hydrosphere:water || Sources OF water || Ground water || Types OF water

A mixture of milk and water contains 60% milk and remaining water. How much water should be added (in percentage) in mixture to reverse the proportion of milk and water?

A mixture of 45 litres of spirit and water, contains 20% water in it. How much water must be added to it to make water 25% in the new mixture ?

A mixture of milk and water contains 55% milk and remaining water. How much water should be added (in percentage ) in mixture to reverse the proporation of milk and water ?