The tractor plows the first day of 4.5ha, the second day 6.3ha and the third day 5.4ha. It worked whole hours a day, and its hourly performance did not change and was the highest of the possible. How many hectares did it plow in one hour (what is it performance)?

Correct result:

h =  0.9 ha/h


a h=4.5 ha b h=6.3 ha c h=5.4 ha  45=325 63=327 54=233 GCD(45,63,54)=32=9  x=GCD(45,63,54)=9  h=x/10=9/10=910=0.9  a=4.5/h=4.5/0.9=5 h b=6.3/h=6.3/0.9=7 h c=5.4/h=5.4/0.9=6 h  h=0.9=910=910 ha/h=0.9 ha/h

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