Two xeroxes

The performances of the two copiers are in the ratio 3: 4. A machine with higher power will make 7,200 copies in one hour. How many copies will both machines make together in 5 hours?

Correct result:

s =  63000

Solution:

t=5 h h1=7200  h2:h1=3:4  h2=h1 34=7200 34=5400  s=t (h1+h2)=5 (7200+5400)=63000



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