Bus vs. train

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

Calculate time of train journey, if train and bus travelled the same distance.

Correct result:

t =  17.5 min

Solution:

 s=v1(t+10)/60=v2t/60  49(t+10)=77t  t=49107749=17.5 min

49 (t+10) = 77 t

49•(t+10) = 77•t

28t = 490

t = 352 = 17.5

Calculated by our simple equation calculator.



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