A train travels 260 km speed at a time. If the speed
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Time taken to cover a distance of 360 km at new speed = 360/x+5 hours. But since speed cannot be in negative. ∴ x = 40 km/hr. Hence, the original speed of the train is 4 kmhTo cross the bridge the distance to be travelled= Length of train + Platform
=( L + 260), where L= length of the train.
Speed of the train= 72- Km= 72 x 5/18 =20- m/ sec.
Distance travelled in 23- seconds= 20 x 23= 460- metres.
So Length of the train= 460- 260
= 200- metres
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