Question

A train travels a distance of 360km at a uniform speed .If the speed of the train is increased by5km an hour ,the journey would have taken 1 hour less find the original speed of the train.​

Answer 1

Answer:

Given distance=360 km.

Let the speed of the train be x km/hr.

Speed when increased by 5 km/hr =(x+5) km/hr

x

360

−

(x+5)

360

=1

x(x+5)

[360x+1800−360x]

=1

x

2

+5x−1800=0

x

2

+45x−40x−1800=0

x(x+45)−40(x+45)=0

(x−40)(x+45)=0

x=40,−45

The speed of the train is 40 km/hr.

Step-by-step explanation:

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Answer 2

Answer:

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