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# The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim

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Math Expert
Joined: 02 Sep 2009
Posts: 56244
The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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11 Jan 2018, 21:29
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Difficulty:

25% (medium)

Question Stats:

79% (01:09) correct 21% (01:45) wrong based on 42 sessions

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The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approximately what percent of one hour?

A. 27%
B. 17%
C. 11%
D. 10%
E. 6%

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Joined: 25 Jan 2016
Posts: 18
Location: India
GPA: 3.9
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Re: The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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11 Jan 2018, 21:39
6 Min 35 Sec = 60*6 +35 =395 s
3 Min 20 Sec = 60*3 + 20 = 200 s ; So in total 395+200 = 595 sec is what % of 3600 sec ( 1 hour = 60*60 s)

(595/3600)*100 =16.52 % or 17% appox

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Re: The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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11 Jan 2018, 21:42
Alternate method,

6 min -35 S + 3 min -20 s = 9 Min + 55 sec = 10 min appox

10/60*100= 16.66 % ( So , D)
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Re: The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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11 Jan 2018, 23:54
Convert minutes in seconds

6*60+35+3*60+20
360+35+180+20= 595

Divide by 3600 to convert seconds in to hours

$$\frac{595}{3600}$$~$$\frac{600}{3600}$$~$$\frac{1}{6}$$~17%

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The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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20 Jan 2018, 16:37
Bunuel wrote:
The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approximately what percent of one hour?

A. 27%
B. 17%
C. 11%
D. 10%
E. 6%

Add minutes: (6+3) = 9 minutes
Add seconds: (30+25) = 55 seconds $$\approx{1}$$ minute

(9 + 1) = 10 minutes
1 hour = 60 minutes

$$\frac{10}{60}=\frac{1}{6}*100 = (.167 * 100) = 16.7$$ %

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Re: The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim  [#permalink]

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21 Jan 2018, 09:25
Bunuel wrote:
The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approximately what percent of one hour?

A. 27%
B. 17%
C. 11%
D. 10%
E. 6%

$$\frac{( 6*60 + 35 ) + ( 3*60 + 20 )}{60*60}*100$$

= $$\frac{395 + 200}{3600}*100$$

= 16.53%

~ 17 % answer will be (B)
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Re: The sum of 6 minutes, 35 seconds and 3 minutes, 20 seconds is approxim   [#permalink] 21 Jan 2018, 09:25
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