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# Average speed

Author Message
Manager
Joined: 03 Sep 2009
Posts: 75

Kudos [?]: 112 [0], given: 3

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19 Jan 2010, 01:35
1
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Hi,
Could anybody help me in getting the clear logic and concept behind the following question:

Q: If it took a bus 4 hours to get from town A to town B, what was the average speed of the bus for the trip?
1. In the first 2 hours the bus covered 100 miles.
2. The average speed of the bus for the first half of the distance was twice its speed for the second half.

Doubtful points:
a) Here whether the first half (as mentioned in the second statement) means exactly the distance covered in 2 hrs like the exact mid point of the journey or could be any adhoc half.
b) Average speed in the first half vs the normal speed in the second half.

-Amit

Kudos [?]: 112 [0], given: 3

VP
Joined: 05 Mar 2008
Posts: 1467

Kudos [?]: 305 [0], given: 31

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19 Jan 2010, 06:53
amitanand wrote:
Hi,
Could anybody help me in getting the clear logic and concept behind the following question:

Q: If it took a bus 4 hours to get from town A to town B, what was the average speed of the bus for the trip?
1. In the first 2 hours the bus covered 100 miles.
2. The average speed of the bus for the first half of the distance was twice its speed for the second half.

Doubtful points:
a) Here whether the first half (as mentioned in the second statement) means exactly the distance covered in 2 hrs like the exact mid point of the journey or could be any adhoc half.
b) Average speed in the first half vs the normal speed in the second half.

-Amit

It says "first half of the distance"

Means the total distance/2. If the distance is 200 miles then 100 miles are covered.

Kudos [?]: 305 [0], given: 31

VP
Status: Final Lap Up!!!
Affiliations: NYK Line
Joined: 21 Sep 2012
Posts: 1078

Kudos [?]: 661 [0], given: 70

Location: India
GMAT 1: 410 Q35 V11
GMAT 2: 530 Q44 V20
GMAT 3: 630 Q45 V31
GPA: 3.84
WE: Engineering (Transportation)

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06 Feb 2013, 10:43
Can any one help one this,
http://www.beatthegmat.com/bus-speed-t56289.html
it says that answer is C, but the OA from GMAT club test says answer is E

Kudos [?]: 661 [0], given: 70

Math Expert
Joined: 02 Sep 2009
Posts: 42249

Kudos [?]: 132588 [0], given: 12326

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07 Feb 2013, 01:18
Archit143 wrote:
Can any one help one this,
http://www.beatthegmat.com/bus-speed-t56289.html
it says that answer is C, but the OA from GMAT club test says answer is E

Discussed here: if-it-took-a-bus-4-hours-to-get-from-town-a-to-town-b-what-102361.html and here: m16-75407.html

Notice that the question was edited and it now reads:

If it took a bus 4 hours to get from town A to town B, what was the average speed of the bus for the trip?

(1) In the first 2 hours the bus covered 100 miles.
(2) The average speed of the bus for the first half of the distance was twice its average speed for the second half.
_________________

Kudos [?]: 132588 [0], given: 12326

Re: Average speed   [#permalink] 07 Feb 2013, 01:18
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# Average speed

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