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# A certain copy machine produces 13 copies every 10 seconds. If the mac

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Re: A certain copy machine produces 13 copies every 10 seconds. If the mac [#permalink]
Bunuel wrote:
A certain copy machine produces 13 copies every 10 seconds. If the machine operates without interruption, how many copies will it produce in an hour?

(A) 78
(B) 468
(C) 1800
(D) 2808
(E) 4680

Sol:

Formula

Rate X Time= Work

13 Copies for every 10s => Rate = 13 Copies/10 seconds
Now for 1 hr =60 min x 60sec=3600 seconds =(Time)

Therefore Rate x Time = (13 /10)*3600 = 4680

Ans: Option E
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Re: A certain copy machine produces 13 copies every 10 seconds. If the mac [#permalink]
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Re: A certain copy machine produces 13 copies every 10 seconds. If the mac [#permalink]
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