A cargo ship can carry containers weighing up to 50,000 tonnes. If it costs £1 million to rent out the entire space on this ship, how much will it cost if I want to rent out 3/5 of the entire space? How many tonnes of space do the firm have left to sell on?
3/5 * 1,000,000 = £600,000
3/5 * 50,000 = ______ tonnes