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10 Oct 2015, 07:43
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:02) correct
26%
(01:17)
wrong
based on 168
sessions
History
Date
Time
Result
Not Attempted Yet
How long did Mr. X take to cover 5000 km journey with 10 stopovers?
(1) The (i^th) stopover lasted (i^2) minutes.
(2) The average speed between any two stopovers was 66 kmph
(1) The (i^th) stopover lasted (i^2) minutes.
(2) The average speed between any two stopovers was 66 kmph
ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
Posts: 2,319
Given Kudos: 816
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE:Engineering (Aerospace and Defense)
Products:
11 Oct 2015, 21:34
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shreeya
The question asks us about the time taken to travel 5000 km including 10 stopovers. So you need the speed or time between the stopovers and for how long was each stopover in order to determine the total time taken.
Per statement 1, i^th stopover lasted i^2 minutes. In other words 1st stopover lasted 1 minute, 2nd lasted 4 minutes, 3rd stopover lasted 9 minutes etc.
This statement provides information about the length of the stopover but not about the time taken between the stopovers. Thus this statement is not sufficient.
Per statement 2, average speed = 66 kmph. Again without the time for each stopover, this statement is not sufficient.
Combining, you get both the parameters required to find the time taken and as such is this sufficient.
C is the correct answer.
Hope this helps.
