To produce an old photograph, a photographer charges Tk. x to make a negative, Tk. 3x/5 for each of the first 10 prints, and Tk. x/5 for each print in excess of 10 prints. If Tk. 45 is the total charge to make a negative and 20 prints from an old photograph, what is the value of x?
সমাধান
সঠিক উত্তর: Option B