The school printer used to print a job in 2 hours and its speed was 1,000 pages per hour. It has been replaced by a slower one with a speed of 800 pages per hour. How long will it take to print the same job as before?
A) 2 hours and 40 min.
B) 2 hours and 30 min.
C) 2 hours and 20 min.
D) 2 hours and 10 min.
E) 3 hours.
Could had solution but didn't but I gonna justify:
Printer 1:
1work - 2hs - V = 1000p/H
Printer 2:
1work - X - V = 800p/H
One of solve it is think if the velocity is 1000p/H and took 2 hours no calculation just are 2000pages.
and for the 2nd V = pages/time -> 800 = 2000/t -> 800t = 2000 -> t = 2000/800; t = 2.5 in the calculator, 2 hours and 0.5 means in hours half of one hour that is 30 minutes, but if you was making by hand would be that way you divide 2000[800 you find 2 and before put the colon and give more one zero you stop beofre that and got the rest that is minutes, a lot of people don't know.
Rute Bezerra de Menezes Gondim
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