Bus vs. train

The bus started from point A 10 minutes before the train started from the same place. The bus went at an average speed of 49 km/h, train at 77 km/h.
To point B train and bus arrived simultaneously.

Calculate the train journey time if the train and bus traveled the same distance.

Correct answer:

t =  17.5 min

Step-by-step explanation:

 s=v1(t+10)/60=v2t/60  49(t+10)=77t  t=77494910=17.5 min

49 (t+10) = 77 t

49·(t+10) = 77·t

28t = 490


t = 490/28 = 17.5

t = 35/2 = 17.5

Our simple equation calculator calculates it.



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