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05 Jun 2025, 00:30
Kudos
Bookmarks
E
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:
78% (00:51) correct
22%
(00:56)
wrong
based on 72
sessions
History
Date
Time
Result
Not Attempted Yet
What is the average speed of an automobile as it travels the 300 miles between city A and city B ?
(1) The automobile averages 50 miles per hour for the first three hours.
(2) The automobile averages 45 miles per hour for the last three hours.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
(1) The automobile averages 50 miles per hour for the first three hours.
(2) The automobile averages 45 miles per hour for the last three hours.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
05 Jun 2025, 01:25
Kudos
Bookmarks
D = 300
S=?
S1
The automobile averages 50 miles per hour for the first three hours.
Distance covered = 50*3 = 150
We don't know the time taken to cover the next 150 miles
Insufficient
S2
The automobile averages 45 miles per hour for the last three hours
Distance covered = 45*3 = 135
We don't know the time taken to cover the first 165 miles
Insufficient
Combined we have first 150 miles covered in 3 hrs and last 135miles covered in another 3 hours. However we do not have info on the 15miles covered in between. Insufficient
Answer E
S=?
S1
The automobile averages 50 miles per hour for the first three hours.
Distance covered = 50*3 = 150
We don't know the time taken to cover the next 150 miles
Insufficient
S2
The automobile averages 45 miles per hour for the last three hours
Distance covered = 45*3 = 135
We don't know the time taken to cover the first 165 miles
Insufficient
Combined we have first 150 miles covered in 3 hrs and last 135miles covered in another 3 hours. However we do not have info on the 15miles covered in between. Insufficient
Answer E
Bunuel
05 Jun 2025, 08:30
Kudos
Bookmarks
What is the average speed of an automobile as it travels the 300 miles between city A and city B ?
(1) The automobile averages 50 miles per hour for the first three hours
Speed= 50 mph
Time= 3 hrs....we don't know time and speed for the rest of the journey.
Insufficient
(2) The automobile averages 45 miles per hour for the last three hours.
Time= 3 hrs
Speed= 45 mph
We don't know time and speed for the first part of the journey.
Insufficient
(1)&(2)
Distance= 50*3+45*3= 150+135= 285.
We don't know time or speed for the remaining 15 miles.
Insufficient
Answer: E
(1) The automobile averages 50 miles per hour for the first three hours
Speed= 50 mph
Time= 3 hrs....we don't know time and speed for the rest of the journey.
Insufficient
(2) The automobile averages 45 miles per hour for the last three hours.
Time= 3 hrs
Speed= 45 mph
We don't know time and speed for the first part of the journey.
Insufficient
(1)&(2)
Distance= 50*3+45*3= 150+135= 285.
We don't know time or speed for the remaining 15 miles.
Insufficient
Answer: E
