`2 m^3` of Soil containing 35% sand was mixed into `6 m^3` of soil containing 15% sand. What is the sand content of the mixture?

10 litre. of a mixture A of Castrol oil and petrol containing 64% petrol, is added to 5 litre of a mixture B of Castrol oil and petrol, containing 55% petrol, to get a mixture M. Then, 30 litre of a mixture C containing 12% castrol oil is added to M. What is the percentage content of oil in the final mixture?

How much pure alcohol has to be added to 400 mL of a solution containing 15% of alcohol to change the concentration of alcohol in the mixture to 32%?

Read the following statements with reference to soil (i) Weathering is a very fast process of soil formation (ii) Percolation of water is faster in sandy soils (iii) Loamy soil contains only sand and clay (iv) Top soil contains the maximum amount of humus. Choose the correct statements from the above

The ratio of sand to gravel in a mixture is 7 : 8 while that between gravel and cement is 6 :7, What is the ratio of sand to cement in the mixture?

Define octane number. A sample of gasoline produces the same knocking as mixture containing 35% n-heptane and 65% iso-octane. What is the octane number of the sample ?

The ratio of sand to gravel in a mixture is 17 : 8 while that between gravel and cement is 6: 17. What is the ratio of sand to cement in the mixture?

How is it that in the gizzard its lining is not damaged while the soil containing sand particles is ground up?

The ratio of sand to gravel in a mixture is 17 :9 while that between gravel and cement is 6 : 17 . What is the ratio of sand to cement in the mixture ?

In 6 litre mixture of spirit and water there is 15% water. In this mixture 4 litre of another mixture contains 10% water is mixed. After this 1.5 litre of spirit and 0.5 litre of water is mixed in this mixture. Find the percentage of water in the final mixture.