Question

a train travels 3km at a uniform speed if the speed had been 5km/h more it would have takes 1 hours less for the same journey find the speed of the train​

Answer 1

Step-by-step explanation: 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.