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23 Dec 2015, 21:03
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (01:34) correct
19%
(01:38)
wrong
based on 2752
sessions
History
Date
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Not Attempted Yet
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.
ID: 700100
(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.
ID: 700100
23 Dec 2015, 21:57
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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.
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.
17 Feb 2016, 20:10
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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.
