Question

un calator are de facut un drum . in prima zi el merge o distanta de patru ori mai mica decat drumul , a doua zi merge o diatanta de 3 ori mai mica decat avea de mers , a treia zi parcurge jumatate din cat ii mai ramasese, iar a patra parcurge 30 de km . Ce lungime are drumul ?

Answer 1

|___________|___________|___________|___________|=> DRUMUL
\------------------/=>distanta de 4 ori mai mica decat drumul=>1/4 (din drum)
                       \--------------------------------------------------------/=>distanta ramasa
                        \-----------------/=>dist.de 3 ori mai mica=>1/3 (din rest)
                                             \-------------------------------------/=>distanta ramasa
                                              \-----------------/=>jumatate din rest=>1/2
                                                                   \------------------/=>30 km.a patra zi
=>30 km a parcurs a patra zi
30*2=60 km ramasi in a treia zi
60:2=30 km parcutsi a treia zi
60+30=90 km ramasi a doua zi
90:3=30 km a parcurs a treia zi
90+30=120 km este lungimea drumului
120:4=30 km a parcurs in prima zi.

30+30+30+30=120 km in total