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250 meters

260 meters

270 meters

280 meters

C. 270 meters

First convert speed from km/hr to m/sec

So, Speed = 72*(5/18) = 20 m/sec

Time = 26 seconds

Let the length of the train be x meters.

We know, Distance = Speed*Time.

[you can remember this formula as remembering DUST = D*ST, Distance=Speed*Time]

x+250 = 20*26

=> x = 270 meters

So length of the goods train is 270 meter

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