The total cost of 3 tables and 2 chairs is Rs 745 . If one chair costs Rs 40 more than one chair , find the price of each ?

Although your question is not clear but we are assuming that one chair costs Rs 40 more than one table then,
cost of 1 table    = Rs. x 
so cost of 1 chair =  Rs.(40 + x)
Now it is given that total cost of 3 tables and 2 chairs is Rs 745 so,
3x + 2(40+x) = 745
3x +2x + 80 = 745
5x = 745-80
5x = 665
x = 665/5 = 133
so cost of a table = Rs. 133
cost of a chair = 133 +40 = Rs.173