Question

Dupa ce a parcurs 80 de km un biciclist constataca mai are de parcurs 1/5 din drum cati km are tot drumul

Answer 1

Cat are de parcurs:
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Cat mai are de parcurs:
|-----|
Cat a parcurs:
|-----|-----|-----|-----|

Deci 80km=4segmente |:4
1 segment=20km

=> 5 segmente= 20km·5=100km
=>drumul are 200km

Sau:
Notez cu x lungimea drumului
A parcurs: 5x/5 - 1x/5=4x/5=80km
=> x=80km·5/4=20km·5=100km




Raspuns: drumul are 100km