Question

Cativa muncitori aveau de sapat un sant de 2 km in trei zile. Stiind ca in primele doua zile au sapat 1400 m,iar in ultimele doua 1200 m, afla cati metri au sapat in fiecare zi

Answer 1

a-prima zi
b-a doua zi
c-a treia zi
2km=2000m
a+b+c=2000m
a+b=1400m
b+c=1200m

a+b+c=2000m
1400m+c=2000m
c=2000m-1400m
c=600m

b+c=1200m
b+600m=1200m
b=1200m-600m
b=600m

a+b=1400m
a+600m=1400m
a=1400m-600m
a=800m

Verificare: a+b+c=2000m
800m+600m+600m=2000m
1400m+600m=2000m
2000m=2000m corect
Sper ca te-am ajutat.

Answer 2

a+b+c=2 km (2000 m)
a+b=1400 m
b+c=1200 m
a= 2000 - 1200; a= 800 m
b= 1400 m - 800 m; b= 600 m
c= 1200 m - 600 m; b= 600 m
V: 800+600+600=2000 m (2 km)