Question

the train covers a distance of 480 km at a uniform speed if the speed has been 8 kilometre less than it would have taken 3 hours more to cover the same distance find the original speed of the train. why has this question been deleted by Cbse for year 2020-21​

Answer 1

bhai please mujhe khilao and unnati 466

Answer 2

Answer:

The original speed of the train is 40 km/hour

Step-by-step explanation:

Let the original speed of the train be x km/hour

Distance traveled by the train = 480 km

Time taken by train =

x

480

If the train would have taken 3 hours more then time =

x−8

480

⟹

x

480

=

x−8

480

+3

⟹

x

480

−

x−8

480

=3

⟹3x

2

−24x+3840=0

⟹x

2

−8x+1280=0

⟹ x = -32 or x = 40

But speed can not be negative ⟹x=40

Hence, the original speed of the train is 40 km/hour