In a mixture of 28 litres, the ratio of milk and water is 5:2. Set up the equation between the mixture and milk. Draw its graph. By observing the graph find the quantity of milk in the mixture.

The ratio of molecular weight of Hydrogen and Oxygen in water is 1:8. Set up an equation between Hydrogen and Oxygen and draw its graph. From the graph find the quantity of Hydrogen if Oxygen is 12 grams. And quantity of oxygen if hydrogen is 3/2 gms.?

A cubical milk tank holds 125000 litres of milk. Find the length of its side in metres.

If the intercept of a line between the coordinate axes is divided by the point (-5,4) in the ratio 1:2, then find the equation of the line.

25% of the students in a school are girls and others are boys. Form an equation and draw a graph for this. By observing the graph, answer the following : (i) Find the number of boys, if the number of girls is 25. (ii) Find the number of girls, if the number of boys is 45. (iii) Take three different values for number of boys and find the number of girls. Similarly take three different values for number of girls and find the number of boys?

A tank initially contains 50 litres of pure water. Starting at time t = 0 a brine containing with 2 grams of dissolved salt per litre flows into the tank at the rate of 3 litres per minutes. The mixture is kept uniform by stirring and the well - stirred mixture simultaneously flows out of the tank at the same rate. Find the amount of salt present in the tank at any time t gt 0 .

On a graph paper, draw the graphs of the curves y = 4 x^(2) and x = 4 y^(2) . Calculate the area between them from the graph by counting squares. (ii) Using integration, find the area between the above two curves. (Compare (i) & (ii) )