A freight train travels 260 km in the same time a passenger train travels 320 km. If the passenger train averages 15km/hour fast
er than the freight train, what is the average speed of the freight?
1 answer:
Time = t
<span>vf t = 260 </span>
<span>vp t = 320 </span>
<span>so </span>
<span>260/vf = 320/(vf+15) </span>
<span>320 vf = 260 vf +260(15) </span>
<span>60 vf = 390 </span>
<span>3 vf = 39 </span>
<span>vf = 13 km/hour
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