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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
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A girl rode her bicycle from home to school, a distance of 1
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01 Jan 2020, 04:06
01 Jan 2020, 04:06
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A girl rode her bicycle from home to school, a distance of 15 miles, at an average speed of 15 miles per hour. She returned home from school by walking at an average speed of 5 miles per hour. What was her average speed for the round trip if she took the same route in both directions?
(A) 7.5 miles per hour
(B) 10 miles per hour
(C) 12.5 miles per hour
(D) 13 miles per hour
(E) 25 miles per hour
(A) 7.5 miles per hour
(B) 10 miles per hour
(C) 12.5 miles per hour
(D) 13 miles per hour
(E) 25 miles per hour
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Re: A girl rode her bicycle from home to school, a distance of 1
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02 Jan 2020, 09:03
02 Jan 2020, 09:03
Average Speed = Total Distance traveled/ Total time taken.
Total Distance = 15miles + 15miles (going and coming back) = 30 miles
Time taken while going = Distance / Speed = 15miles / 15miles/hours = 1hour
Time taken while coming back = Distance / Speed = 15miles / 5miles/hour = 3hrs
Total time = 1hr + 3hr = 4hrs
Average Speed = Total Distance/ Total time = 30miles / 4hrs = 7.5 Miles/hour
So, Answer will be A
Hope it helps!
I have also attached an image of the theory slide with this post.
Total Distance = 15miles + 15miles (going and coming back) = 30 miles
Time taken while going = Distance / Speed = 15miles / 15miles/hours = 1hour
Time taken while coming back = Distance / Speed = 15miles / 5miles/hour = 3hrs
Total time = 1hr + 3hr = 4hrs
Average Speed = Total Distance/ Total time = 30miles / 4hrs = 7.5 Miles/hour
So, Answer will be A
Hope it helps!
I have also attached an image of the theory slide with this post.
Attachments
AS.jpg [ 67.77 KiB | Viewed 2589 times ]
Re: A girl rode her bicycle from home to school, a distance of 1
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28 Oct 2022, 06:26
28 Oct 2022, 06:26
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
