Question

(a,b,c)direct proportional[0,(3), 0,25, 0,2]
M aritmetica (a,b,c)=60
Aflati numerele

Answer 1

a/0,(3)=b/0,25=c/0,2=k
a=0,(3)k
b=0,25k
c=0,2k
(a+b+c)/3=60
[0,(3)k+0,25k+0,2k]:3=60
(3/9k+0,25k+0,2k)÷3=60
(3/9k+2,25/9k+1,8/9k)÷3=60
(7,05/9k)÷3=60
(7,05/9k)×1/3=60
7,05k/27=60
k=60×27 /7,05
k=1620/7,05
k=229,78
a=0,(3)×229,78=3/9×229,78=689,34/9=76,59
b=0,25×229,78=57,445
c=0,2×229,78=45,956
Daca faci media o sa iti dea aproximativ 59,997
Dar aproximat este 60
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