Question

Case study: A Determinantis a square array of numbers (written with a pair of vertical lines) which represents a certain sum. we can solve a system of equations using determinants but it becomes very tedious for the larger systems we will only do 2×2 and 3×3 systems using determinants. using the properties of determinants solve the problem given below and answer the questions that follows:. Three shopkeepers Ram Lal, Shyam Lal and Ghanshyam are using polythene bags, handbags (prepared by the prisoners) and newspapers envelope as carry bags. it is found that the shopkeepers Ramlal, Shyam Lal and Ghanshyam are using (20,30,40) , (30,40,20) and (40,20,30) polythene bags, handbags and newspapers envelops respectively. The shopkeepers Ramlal ,Shyam Lal and Ghanshyam spend rupees 250, rupees 270 and rupees 200 on these carry bags respectively. (1.) What is the cost of one polythene bags? *​

Answer 1

2*2+3*3=13 bye bye tatal