Question

The distance traversed by a train is 600 km. Time taken is 15 hrs. What is the speed of the train?

Answer 1

Answer:

Explanation:

Let the speed be x km/h

600/x - 600/ (x+5) = 4

600( x+5) -600x = 4x ( x+5)

600x +3000 - 600x = 4x^2 +20x

4x^2 +20x- 3000 =0

x^2 + 5x - 750 = 0

( x+30) ( x-25) =0

x = 25 km/h ANSWER

Answer 2

Answer:

aeroplane

Explanation:

a fast and 2hr will take