Question

A train travels 360km at a uniform speed. if the speed had been 5km/h more,then it would have taken 1 hour less for the same journey.find the speed of the train
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Answer 1

Step-by-step explanation:

uniform spead

time =distance /speed

t1=360/x. first

if 5km/h more speed

t2=360/x+5second

compare first n second

t1. =t2+1

360/x=360/x+5+1

360/x-360/x+5=1

360(x+5-x)/x(x+5)

solve this form

$x {}^{2} + 5x - 1800 = 0$

solve it by quadratic formula

x=40

so,the speed of train is 40km/h