Que : 121. A cooperative society of farmers has 50 hectares of land to grow two crops X and Y. The profit from crops X and X per hectare are estimated as Rs. 10,500 and Rs. 9,000 respectively. To control weeds, a liquid herbicide has to be used for crops X and Y at rates of 20 litres and 10 litres per hectare. Further, no more than 800 litres of herbicides should be used in order to protect fish and wild life using a pond which collects drainage from this land How much land should be allocated to each crop so as to maximise the total profit of the society ?