quick question (1 Viewer)

[fullonoob]

Two trains each make a journey of 330 km. One of the trains travel 5 km/h faster than the other and takes 30 mins less time. find the speeds of each train.

Was a previously posted question, but the d = v /t stuffed me up
Full working please

 

[ohexploitable]

Let the trains be A and B.

For A:

Let speed of A = s
Let time of A = t
Distance = 330

s = d/t

300 = st -----------------(1)

For B:

Speed = s+5
Time = t-0.5
Distance = 330

300 = (s+5)(t-0.5) --------------------(2)

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Then do simultaneous equations. You should end up with 55km/h and 60km/h.

 

[ohexploitable]

but the d = v /t stuffed me up

That's because d = st (or d = vt if you don't like scalar quantities).