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If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, wha

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If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, wha [#permalink]

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New post 21 Feb 2017, 04:19
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  15% (low)

Question Stats:

82% (00:47) correct 18% (00:13) wrong based on 22 sessions

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If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, what was its speed in miles per hour?

(A) 6
(B) 6.5
(C) 8
(D) 8.5
(E) 10
[Reveal] Spoiler: OA

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Re: If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, wha [#permalink]

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New post 21 Feb 2017, 04:51
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SajjadAhmad wrote:
If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, what was its speed in miles per hour?

(A) 6
(B) 6.5
(C) 8
(D) 8.5
(E) 10



10 mins is simply 10/60 = 1/6 hrs

1 hr 10 mins is then equal to 1 + 1/6 = 7/6 hrs

Speed in miles/hr = 7 miles/(7/6 hrs) = 6 miles/hr

Answer (A)
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Re: If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, wha [#permalink]

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New post 23 Feb 2017, 09:41
SajjadAhmad wrote:
If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, what was its speed in miles per hour?

(A) 6
(B) 6.5
(C) 8
(D) 8.5
(E) 10


We are given that the time is 1 hour and 10 minutes. Let’s convert it to hours only:

1 hour and 10 minutes = 1 hour and 1/6 hours = 7/6 hours

Since rate = distance/time, the rate in miles per hour is:

7/(7/6) = 42/7 = 6 mph

Alternate Solution:

We know that the trailer travels 7 miles in 70 minutes, which is 1 mile per 10 minutes. Thus, it will travel 6 miles in 60 minutes, or 6 mph.

Answer: A
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Re: If a heavy-load trailer traveled 7 miles in 1 hour and 10 minutes, wha   [#permalink] 23 Feb 2017, 09:41
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