By how much is the greatest of six consecutives even integers greater than the smallest among them?
The price of commodity X increases by 40 paisa every year, while the price of commodity Y increases by 15 paisa every year. If in 2023, the price of commodity X was Tk. 4.20 and that of Y was Tk. 6.30, in which year commodity X will cost 40 paisa more than the commodity Y?