It is currently 20 Nov 2017, 00:58

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Bill drove from Metropolis to Smallville at an average speed

Author Message
Senior Manager
Joined: 02 Oct 2005
Posts: 297

Kudos [?]: 24 [0], given: 0

Bill drove from Metropolis to Smallville at an average speed [#permalink]

### Show Tags

09 Nov 2005, 10:41
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Bill drove from Metropolis to Smallville at an average speed of 75 miles per hour. If he returned immediately to Metropolis, driving along the same route at an average speed of 50 miles per hour, what was the average speed, in miles per hour, for the entire round trip?

A) 57.5

B) 60

C) 62.5

D) 67.5

E) 70

Kudos [?]: 24 [0], given: 0

Intern
Joined: 01 Jun 2005
Posts: 40

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

### Show Tags

09 Nov 2005, 10:46
sudhagar wrote:
Bill drove from Metropolis to Smallville at an average speed of 75 miles per hour. If he returned immediately to Metropolis, driving along the same route at an average speed of 50 miles per hour, what was the average speed, in miles per hour, for the entire round trip?

A) 57.5

B) 60

C) 62.5

D) 67.5

E) 70

M-->S
rate - 75m/hr
dist - 150 (assumed)
time - 2 hrs

S-->M
rate - 50 m/hr
dist - 150 (sames as above)
time - 3 hrs

total trip avg speed = (150+150)/(2+3) = 60 m/hr (B)

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

Senior Manager
Joined: 11 May 2004
Posts: 453

Kudos [?]: 55 [0], given: 0

Location: New York

### Show Tags

09 Nov 2005, 14:08
Another 60 mph.

Lets say distance is 150 miles. It takes 2 hours at 75mph, and 3 hours at 50 mph.

Just add the totals up to get 300/5hours and we get 60 mph.

Kudos [?]: 55 [0], given: 0

Senior Manager
Joined: 02 Oct 2005
Posts: 297

Kudos [?]: 24 [0], given: 0

### Show Tags

09 Nov 2005, 21:00
Thats correct OA is B ... 60mph.

Kudos [?]: 24 [0], given: 0

Senior Manager
Joined: 07 Jul 2005
Posts: 402

Kudos [?]: 61 [0], given: 0

### Show Tags

09 Nov 2005, 21:39
For people who are have problems solving with variables.

Let the distance, x equal 150 miles. Therefore,

t1 = 150/75 = 2 hours
t2 = 150/50 = 3 hours

Average speed = total distance/total time = 300/(2+5) = 60 miles/hour

Pick B.

Kudos [?]: 61 [0], given: 0

09 Nov 2005, 21:39
Display posts from previous: Sort by