a paper mill produce two grades of paper viz., X and Y. because of raw material restrictions, it cannot produce more than 400 tona of grade X and 300 tons of grade Yin a week. there are 160 production hours in a week. it requires 0.20 and 0.40 hours to produse a ton of grade X and Y paper. the mill earns a profit of Rs. 200 and Rs.500/ton of grade X and Y. formulate as a LPP