Question

what is metro train? for class 2nd
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Answer 1

Metro trains running in a Metropolis covering all important residential, commercial and entertainment areas.

Its a short definition*

Answer 2

$\huge \pink {aNswer}$

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