Q- An agricultural Co-operative Society of village of Pachla has purchased a tractor. Previously 2400 bighas of land were cultivated by 25 ploughs in 36 days. Now half of the land can be cultivated only by that-tractor in 30 days. Let us calculate by using the theory of variations, the number of plough work equally with one tractor. Chapter: VariationView Answer
Q- If 15 farmers can cultivate 18 bighas of land in 5 days, let us determine by using theory of variation the number of days required by 10 farmers to cultivate 12 bighas of land. Chapter: VariationView Answer
Q- Volume of a sphere varies directly with the cube of its radius. Three solid spheres having length of 1 1/2, 2 and 2 ½ meter diameter of the new sphere. [let us consider that the volume of sphere remains same before and after melting] Chapter: VariationView Answer