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A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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27 Oct 2014, 21:42

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A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

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27 Oct 2014, 21:50

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alexa wrote:

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

Re: A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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27 Oct 2014, 21:52

alexa wrote:

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

Re: A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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28 Oct 2014, 02:10

alexa wrote:

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

Re: A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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04 Jun 2016, 08:57

alexa wrote:

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

Re: A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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11 Aug 2017, 22:09

alexa wrote:

A Car traveling at a constant speed took 1 minute 48 seconds to travel the distance between a certain road sign and the beginning of a roadwork area. If the distance between the road sign and the beginning of the road work area was 2,400 meters, then the car was traveling at what speed, in kilometers per hour? (1kilometer = 1,000 meters)

A Car traveling at a constant speed took 1 minute 48 seconds to travel [#permalink]

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11 Aug 2017, 22:28

Whenever, we need to convert a speed in km/hr to m/s, you multiply it by a factor of \(\frac{5}{18}\) We arrive to \(\frac{5}{18}\) as follows :

1 km is 1000 meters 1 hr is 60 minute, and 1 minute is 60 seconds. 1 hr is 3600 seconds

So 1 km/hr essentially converts to \(\frac{1000}{3600}\) or \(\frac{5}{18}\)m/s Therefore, In order to convert the speed from m/s to km/hr, you must multiply it by a factor of \(\frac{18}{5}\)

Coming back to the question in hand The car travels 2400 meters in 1 minute 48 seconds(108 seconds) Speed(in m/s) = \(\frac{Distance}{Time} = \frac{2400}{108} = \frac{200}{9}\)

In order to convert the speed in the format that it has been asked in, we multiply it by a factor of \(\frac{18}{5}\)

So, the converted speed(in km/hour as asked in the question) is \(\frac{200}{9}*\frac{18}{5}\) = 80 km/hr.

Hi Bunuel, Can you please add options to this question to make it more GMAT-like! Thanks
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