Life Situation 1: Airport Rush
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 per minute, 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?
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1 solution
Taxi
= 5m wait time + 3km/m
= 5m wait time + 30km/3m
= 5m + 10m
= 15m
Tram
= 1m wait time + 3m per station at 4 stations + 6km/m
= 1m wait time + 12m at stations + 30km/6m
= 1m + 12m + 5m
= 18m
Bus
= 1m wait time + 1m per station at 3 stations + 2km/m
= 1m wait time + 3m at stations + 30km/2m
= 1m + 3m + 15m
=19m