Question

Distanta dintre 2 orase este 315 km. In prima ora s-au parcurs 63 km,in ora a doua-34,65 km. Cate procente din intreaga distanta s-a parcurs:
a) in prima ora
b) a doua ora
c) in primele doua ore?

Answer 1

a)315km.......100%
   63km..........x%
    $x= \frac{63km*100}{315} =20$ %
b) 315km......100%
     34,65km....x%
   $x= \frac{34,65km*100}{315} =11$ %
c)  20%+11%=31%

Answer 2

d = 315 Km
in prima ora = 63 km = >a%= (63:315)x100 = 20%
in a doua ora = 34,65 km => b% = 34,65 :315 x 100= 11%
in cele doua ore = 63 km+34,65 km = 97,65 Km => c%=97,65:315x100 = 31%
au ramas de parcurs =315km-97,65km =217,35km ; adica
217,35:315x100= 69%
69%+31%=100% verificat.
Am bolduit rezultatele cerute.