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15 Dec 2018, 07:03
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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:
75% (00:47) correct
25%
(00:53)
wrong
based on 1495
sessions
History
Date
Time
Result
Not Attempted Yet
What was John's average driving speed in miles per hour during a 15-minute interval?
(1) He drove 10 miles during this interval.
(2) His maximum speed was 50 miles per hour and his minimum speed was 35 miles per hour during this interval.
(1) He drove 10 miles during this interval.
(2) His maximum speed was 50 miles per hour and his minimum speed was 35 miles per hour during this interval.
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atshy21saraf
Joined: 10 Aug 2015
Last visit: 05 Jan 2022
Posts: 22
Given Kudos: 55
Location: India
Concentration: Operations, Entrepreneurship
Schools: ISB '17 Berkeley Haas SPJ GMBA '17 NUS '18 IIMB'17 XLRI GM"18
GMAT 1: 610 Q49 V25
GPA: 2.91
WE:Engineering (Real Estate)
Schools: ISB '17 Berkeley Haas SPJ GMBA '17 NUS '18 IIMB'17 XLRI GM"18
GMAT 1: 610 Q49 V25
Posts: 22
21 Dec 2018, 10:31
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Average Speed= Total Distance traveled/Total Time
(1) He drove 10 miles during this interval
Total Time 15 mins. (given)
Total Distance= 10 miles
We have sufficient info with this.
Sufficient
(2) His maximum speed was 50 miles per hour and his minimum speed was 35 miles per hour during this interval.
This would not help as avg. speed does not come simply taking average of speeds.
Not Sufficient
Ans.: A
(1) He drove 10 miles during this interval
Total Time 15 mins. (given)
Total Distance= 10 miles
We have sufficient info with this.
Sufficient
(2) His maximum speed was 50 miles per hour and his minimum speed was 35 miles per hour during this interval.
This would not help as avg. speed does not come simply taking average of speeds.
Not Sufficient
Ans.: A
06 Mar 2023, 23:35
Kudos
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1) We have total distance & total time, hence we can get Avg. Speed directly
2) As we just know the the maximum & minimum speed but don’t know for how much distance or time it was maintained hence cannot get avg speed
Posted from my mobile device
2) As we just know the the maximum & minimum speed but don’t know for how much distance or time it was maintained hence cannot get avg speed
Posted from my mobile device
