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# During a certain bicycle ride, was Sherry's average speed faster than

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Joined: 27 Sep 2015
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GMAT 1: 410 Q33 V13
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During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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23 Dec 2015, 21:03
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Difficulty:

25% (medium)

Question Stats:

75% (01:34) correct 25% (01:34) wrong based on 672 sessions

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During a certain bicycle ride, was Sherry's average speed faster than 24 kilometers per hour? (1 kilometer = 1000 meter)

(1) Sherry's average speed during the bicycle ride was faster than 7 meters per second.
(2) Sherry's average speed during the bicycle ride was slower than 8 meters per second.

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Re: During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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23 Dec 2015, 21:57
3
In speed /rate

if question stem gives m/sec , you can covert km/hr multiply by 18/5.

here how 18/5 .

vice versa , if we want convert from km/hr to m/sec multiply by 5/18.

statement 1:
greater than 7m/sec=7*18/5=

=126/5= greater than25.2km/hr.
sufficient.

statement 2 less than 8m/sec
<28.8km/hr

It can be greater than 24km/hr or less than 24km/hr. not sufficient.

Option A is correct.
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During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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17 Feb 2016, 20:10
3
As both choices are in meters per second, one way to do this faster is to convert the value in question stem to same unit of measurement. 24 kmph = $$24*1000/(60*60)$$ = 6.6 meters per second. Now the question becomes: Is speed faster than 6.6 m/s? Clearly, only choice A answers that.
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During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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18 May 2017, 10:35
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1
didn't read slower and chose D within 5 secs.

so (1) is sufficient anyway --> the questions is not whether it is actually true, just if we can figure it out

(2) statement 2 says < 28.8 so could be less than 24 but could also be greater

such a stupid mistake
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Re: During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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21 Sep 2018, 09:44
Dear Moderator,
Please edit tag. This is sub-600.
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Re: During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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19 Oct 2018, 10:14
RSOHAL wrote:
During a certain bicycle ride, was Sherry's average speed faster than 24 kilometers per hour? (1 kilometer = 1000 meter)

(1) Sherry's average speed during the bicycle ride was faster than 7 meters per second.
(2) Sherry's average speed during the bicycle ride was slower than 8 meters per second.

We take the minimum possible value as 7 (since it was faster than that if 7 satisfies it then anything above 7 will satisfy it)

$$\frac{7 meters}{sec} * \frac{60 secs}{min} * \frac{60 mins}{hour} * \frac{km}{1000 meter}$$ = $$\frac{7 * 3600}{1000} = \frac{7 * 36}{10}$$

$$\frac{252}{10}= 25.2 > 24$$ Sufficient.

Eliminate B/C/E

Statement 2)

slower than 8 means it could be 7 or 6 or any other number from this we cannot determine for sure.

So insufficient.

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Re: During a certain bicycle ride, was Sherry's average speed faster than  [#permalink]

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05 Apr 2019, 00:44
During a certain bicycle ride, was Sherry's average speed faster than 24 kilometers per hour? (1 kilometer = 1000 meter)

$$24 km/hour = 24 * 1000 m/hour = \frac{24000}{60} meters/ minute = \frac{24000}{3600} meters / second = \frac{20}{3}=6.67 m/s$$

New question stem Was was Sherry's average speed faster than 6.67 m/s

(1) Sherry's average speed during the bicycle ride was faster than 7 meters per second.

7 is greater than 6.67 m/s Sufficient

(2) Sherry's average speed during the bicycle ride was slower than 8 meters per second.
Yes if avg speed was slower than 8 but faster than 6.67
No, if avg speed is slower than 6.67

Not sufficient

Hence A
Re: During a certain bicycle ride, was Sherry's average speed faster than   [#permalink] 05 Apr 2019, 00:44
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