Răspunsuri

2014-01-31T14:23:44+02:00
S=suprafata
prima zi: 1/2s=> rest de cultivat r1=s-/2s=1/2s
a 2-a zi: 1/3r1= 1/3*1/2s=1/6s=> rest de cultivat r2=r1-1/6s=1/2s-1/6s=2/6s=1/3s
a 3-a zi: 1/4r2=1/4*1/3s=1/12s=> rest de cultivat r3=r2-1/12s=1/3s-1/12s=3/12s=1/4s
dar stim ca r3=10ha
=> 1/4s=10ha=> s=4*10=> s=40ha

Deci suprafata totala de cultivat este de 40ha.
2014-01-31T19:14:18+02:00
R:
s=suprafata
prima zi: 1/2s=> rest de cultivat r1=s-/2s=1/2s
a 2-a zi: 1/3r1= 1/3*1/2s=1/6s=> rest de cultivat r2=r1-1/6s=1/2s-1/6s=2/6s=1/3s
a 3-a zi: 1/4r2=1/4*1/3s=1/12s=> rest de cultivat r3=r2-1/12s=1/3s-1/12s=3/12s=1/4s
dar stim ca r3=10ha
=> 1/4s=10ha=> s=4*10=> s=40ha