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easy one.

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by uptowngirl92 » Tue Jun 09, 2009 7:34 pm
There are how many hours between x minutes past 12 noon and 8:10 p.m. of the same day, where x < 60?

(A) 490-x/60
(B) 480-x/60
(C) 470-x/60
(D) 60 (60 – x + 7)
(E) 60 (60 – x + 17)

Could somebody explainthe workings?OA:A
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by ssmiles08 » Tue Jun 09, 2009 8:29 pm
I would think the simplest way of doing this is if you take x = 0

so then it would be 12:00 to 8:10PM ---> that would be exactly 8 hours and 10 minutes

Choice (A) gives you 490 + 0/60 = 490 minutes.

you convert that into hours; ~8.166 hours

.1667 hours * 60 = 10 minutes

which gives you 8 hours and 10 minutes.
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