A worker earns Tk. 250 on the first day and spends tk. 200 on the second day, earns Tk. 250 on the third day and again spends Tk. 200 on the fourth day and so no. On which day would he have had Tk. 1000?
ক) 20th day
খ) 30th day
গ) 31th day
ঘ) 40th day
