Arif is paid an houly wage, totalling Tk.400 for 'h' hours of work in a week, where 'h' >0. If his houly wage increase by 25%...

Arif is paid an houly wage, totalling Tk.400 for 'h' hours of work in a week, where 'h' >0. If his houly wage increase by 25% and he dicides to work 25% fewer hours each week, how much (in Tk) will he be paid in a week?.