A train cover a distance of 480 km at a speed of x km/hr. If it's we
speed is reduced to (x -20 )km/hr, it takes 4 hours to cover the same distance.Find the value of x.
Use quadratic equation.
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Answer:
Step-by-step explanation:
Using speed =distance / time
(X-20)=480/4
X=140kmph
I
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