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# At a constant speed of 72 kilometers per hour, a vehicle travels

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Intern
Joined: 16 Oct 2017
Posts: 24
At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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09 Feb 2018, 19:36
00:00

Difficulty:

15% (low)

Question Stats:

81% (00:37) correct 19% (00:50) wrong based on 32 sessions

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At a constant speed of 72 kilometers per hour, a vehicle travels how many kilometers per second?

A) 0.02
B) 0.2
C) 0.6
D) 1.2
E) 6.0
[Reveal] Spoiler: OA
Intern
Joined: 31 Dec 2017
Posts: 18
Concentration: Finance
Re: At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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09 Feb 2018, 20:03
OCDianaOC wrote:
At a constant speed of 72 kilometers per hour, a vehicle travels how many kilometers per second?

A) 0.02
B) 0.2
C) 0.6
D) 1.2
E) 6.0

72 kilometers in 60 mins, there are 60*60 = 3600 secs in 60 mins, so distance travelled in one second = 72/3600 = 2/100 = 0.02. (A).
Math Expert
Joined: 02 Aug 2009
Posts: 5658
Re: At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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09 Feb 2018, 20:43
OCDianaOC wrote:
At a constant speed of 72 kilometers per hour, a vehicle travels how many kilometers per second?

A) 0.02
B) 0.2
C) 0.6
D) 1.2
E) 6.0

The number is in km per hour but answer asked is in km per second...
So 72 km per hour = $$\frac{72}{60*60}=\frac{72}{36*100}=\frac{2}{100}=0.02$$
A
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Manager
Joined: 31 May 2017
Posts: 67
Re: At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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09 Feb 2018, 22:51
72 kilometers per hour translates to 72 kilometers in 3600 seconds.

Distance traveled per second = 72/3600 = 0.02

Ans: A
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Joined: 07 Jan 2016
Posts: 466
Location: India
GMAT 1: 710 Q49 V36
Re: At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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09 Feb 2018, 23:21
72 kmph

in km/sec

convert hours into seconds
1 hr = 3600 seconds

72/3600

2/100

0.02
Intern
Joined: 31 Jan 2018
Posts: 16
Re: At a constant speed of 72 kilometers per hour, a vehicle travels [#permalink]

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10 Feb 2018, 05:15
72 kilometers in 60 mins, there are 60*60 = 3600 secs in 60 mins, so distance travelled in one second = 72/3600 = 2/100 = 0.02.
Re: At a constant speed of 72 kilometers per hour, a vehicle travels   [#permalink] 10 Feb 2018, 05:15
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