Question 1206997
<pre>
                           SPEEDS          TIME        DISTANCES, km

TRUCK (Amstrd.to.Prag)                       5              

CAR (Prag.to.Amstrd.)         100            5         100*5=500

TOTAL CONSUMED                                             875

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                           SPEEDS          TIME        DISTANCES, km

TRUCK (Amstrd.to.Prag)     375/5             5        875-500=375      

CAR (Prag.to.Amstrd.)         100            5         100*5=500

TOTAL CONSUMED                                             875

</pre>
Speed of the truck,  {{{375/5=highlight(75)}}} kph






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----------------------NOT THIS------------------------------------
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When they "meet", time passed was 5 hours <s>and total distance traveled for both was sum of 875+100=975 km, but this sum distance not needed</s>.  Both car and truck meet at same place.


TRUCK'S SPEED:

{{{cross(875/5=175)}}} kilometers per hour

MAJOR MISTAKE, took, "...heads for Amsterdam at 100  kph" as  '100 km'.