Question

what are metro trains ??
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Answer 1

Rapid transit or mass rapid transit, also known as heavy rail, metro, subway, tube, U-Bahn, T-Bane, metropolitana or underground, is a type of high-capacity public transport generally found in urban areas.

Answer 2

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A metro train is a train that is specifically designed to run in metropolitan cities while local trains are designed to connect the distances within the city and its suburbs areas.