Explanation:

GIVEN: credit Purchases Rs 6,00,000; Trade Payables Turnover Ratio 5;  if closing creditors are Rs 10,000 less than opening creditors.

trade payables turnover ratio =    net credit purchases     = 5 times

                                                      average trade payables

                                                =   Rs 6,00,000  

                                                               5 

                                                 = Rs. 1,20,000   

let closing creditors = X

let opening creditors = X - Rs.10,000

average trade payables =X - Rs.10,000 + X  = Rs. 1,20,000

                                                   2

                                       = 2X - Rs.10,000 = Rs. 1,20,000 * 2

                                       = 2X - Rs.10,000 = Rs. 2,40,000

                                   2X = Rs. 2,40,000 + Rs. 10,000

                                     X = Rs. 2,50,000 / 2

closing creditors  X = Rs. 1,25,000

opening creditors (X - Rs. 10,000) = Rs. 1,25,000 - Rs. 10,000

                                                = Rs. 1,15,000