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16 Aug 2022, 07:05
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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:
45%
(medium)
Question Stats:
68% (01:49) correct
32%
(01:42)
wrong
based on 151
sessions
History
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Time
Result
Not Attempted Yet
Today Dave drove from home to work at twice his regular speed and arrived at work 16 minutes earlier than he regularly arrives. What is the distance from Dave’s home to work?
(1) Dave regular drives at a constant speed of 40 miles per hour.
(2) It regularly takes Dave 32 minutes to drive to work.
(1) Dave regular drives at a constant speed of 40 miles per hour.
(2) It regularly takes Dave 32 minutes to drive to work.
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Archit3110
16 Aug 2022, 07:19
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distance = speed * time
time = distance / speed
let distance be d and speed be s
given
Dave drove from home to work at twice his regular speed and arrived at work 16 minutes earlier than he regularly arrives
d/2s =d/s -16/60
#1
Dave regular drives at a constant speed of 40 miles per hour.
d/80 = d/40 -16/60
solve for d ; 64/3 ; 21.3 miles
sufficient
#2
It regularly takes Dave 32 minutes to drive to work.
d/s = 32 mins
d=32s
d/2s =d/s -16
so it took 16 mins when Dave drove at twice regular speed
but no info about speed to calculate distance
insufficient
option A
time = distance / speed
let distance be d and speed be s
given
Dave drove from home to work at twice his regular speed and arrived at work 16 minutes earlier than he regularly arrives
d/2s =d/s -16/60
#1
Dave regular drives at a constant speed of 40 miles per hour.
d/80 = d/40 -16/60
solve for d ; 64/3 ; 21.3 miles
sufficient
#2
It regularly takes Dave 32 minutes to drive to work.
d/s = 32 mins
d=32s
d/2s =d/s -16
so it took 16 mins when Dave drove at twice regular speed
but no info about speed to calculate distance
insufficient
option A
BrentGMATPrepNow
18 May 2025, 10:10
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A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
