Question

a train having a lenght 500m passes through a tunnel of 1000m in 1 minute.what is the speed of the train in km/h​

Answer 1

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90 km/hr

Let the speed be,

$\sf = distance \: of \: tunnel + \frac{distance \: of \: train} {time \: taken}$

= 3/2 km /1/60 hr

=90 km/hr