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carcass
If a photocopier makes 2 copies in \(\frac{1}{3}\) second, then, at the same rate, how many copies does it make in 4 minutes?

(A) 360

(B) 480

(C) 576

(D) 720

(E) 1,440

The rate of the photocopier, in minutes, is:

2/(1/3) x 60 = 6 x 60 = 360

So in 4 minutes, 360 x 4 = 1,440 copies are made.

Answer: E
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Chain Rule Question -

Time 1/ Work 1 = Time 2/ Work 2

1/3 sec divided by 2 = 240 sec/ x, calculate and you'll find x= 1440
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