Usages of treinta
El autobús tarda treinta minutos en llegar al campus si no hay tráfico.
The bus takes thirty minutes to get to campus if there is no traffic.
Si salimos ahora, llegaremos en treinta minutos y todavía habrá tiempo para tomar un café.
If we leave now, we will arrive in thirty minutes and there will still be time to have a coffee.
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