Question

merchant had rupees 78,592 with her she placed an order for purchasing 40 radio sets at rupees 1200 each how much money will remain with her after the purchase

Answer 1

Cost of 40 radio sets would be 40×1200=48000
Balance left after purchase =48000 subtracted from 78592 =30592

Answer 2

Total money spent on purchasing radio  =   40 * 1200
                                                                =  Rs 48000
Left money with the merchant  =   78592  -  48000
                                                 =  Rs 30592

Hence the merchant had Rs 30952 left with him.

HOPE IT HELPS YOU.