A train travels a distance of 300 km at a uniform speed if the speed of the train is increased by 5 km an hour,the journey would have taken 2 hour less find the original speed of the train
Attachments:
Answers
Answered by
4
Let the original speed of train = X km/hr
Distance=300 km
Speed= Distance / Time
300/X -300/ X+5 =2
300 X -300 X+ 1500=2 X^2 + 10 X
2 X^2 +10 X -1500 = 0
X ^ 2+ 5 X - 750= 0
BY MIDDLE TERM FACTORISATION
X= 25 Km/hr
ANSWER IS 25 KM/HR
Similar questions