Question

If 3 chairs and 1 table together cost of 900.00 and 5chairs and 3 tables together cost rs.2100.00 then how many rupees is the total cost of 4 chairs and 1table

Answer 1

3C+1T = 900 -------(1)
5C+3T= 2100 -------(2)
Multiply (eq 1) by 3 and (eq 2) by 1
9C+3T = 2700 -------(3)
5C+3T = 2100 --------(4)
Subtract eq 4 from eq 3
4C = 600 -------(5)
4 chair costs RS 600 , cost of 1 chair is RS 150.
Put this value in eq 1, we get the cost of 1 table is RS 450.
Cost of 4 chair and 1 table is RS 600+450 = ₹1050