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Exam GMAT Test topic 1 question 245 discussion

Actual exam question from Test Prep's GMAT Test
Question #: 245
Topic #: 1
[All GMAT Test Questions]

It takes Tanya 50 minutes to drive to the country club. If the average speed of the entire round trip to the club is 87.5% of the average speed on the way to the club, how many minutes approximately will it take Tanya to drive home from the country club?

  • A. 42 minutes.
  • B. 48 minutes.
  • C. 52 minutes.
  • D. 54 minutes.
  • E. 66 minutes.
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Suggested Answer: C 🗳️
Define X as the average speed to the country club and Y as the average speed on the way back.
The average speed of the entire round trip to the club is 87.5% of the average speed on the way to the club:
(X + Y) / 2 = 0.875X,
X + Y = 1.75X,
Y = 0.75X.
The average speed on the way back is 75% of the speed to the club.
If the time it takes her to get to the country is T, then T/0.75 is the time it will take to get back home.
50/0.75 = approximately 66 minutes.
by Mukite at March 27, 2022, 7:22 a.m.

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Mukite
4 months, 1 week ago
Correct answer is E
upvoted 1 times
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