You need to go to the airport, and fast! You have 3 choices of transport to choose from: the taxi, the tram and the bus. The airport is 30 kilometres from your house. The taxi travels at a speed of 3 kilometres per minute, but you need to wait 5 minutes for the next taxi. The tram travels at a speed of 6 kilometres per minute, but there are 4 stations between your house and the airport, station A, B, C and D. The tram stops at each station for 3 minutes. You only need to wait 1 minute for the next tram. The bus travels at a speed of 2 kilometres an hour, but there are 3 stations between your house and the airport, station a, b and c. The bus stops at each station for 1 minute and you need to wait for 1 minute before the next bus arrives.
Which transport is the fastest way to get to the airport?