e-GMAT
While making a non-stop trip, a bus averaged m mph for the first 5 hours and n mph, for the remaining 4 hours. What was the average speed of the bus, in mph, for the whole trip?
1) 7.5m + 6n = 465.
2) 2m + 3n = 180.
OA A
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While making a non-stop trip, a bus averaged m mph for the
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Distance traveled in the first 5 hours = 5m.AAPL wrote:e-GMAT
While making a non-stop trip, a bus averaged m mph for the first 5 hours and n mph, for the remaining 4 hours. What was the average speed of the bus, in mph, for the whole trip?
1) 7.5m + 6n = 465.
2) 2m + 3n = 180.
Distance traveled in the remaining 4 hours = 4n.
Average speed for the entire 9-hour trip = (5m + 4n)/9.
To determine the average speed for the entire trip, we need to know the value of 5m+4n.
Question stem, rephrased:
What is the value of 5m+4n?
Statement 1:
Doubling the equation, we get:
15m + 12n = 930
Dividing both sides by 3, we get:
5m + 4n = 310
SUFFICIENT.
Statement 2:
No way to determine the value of 5m+4n.
INSUFFICIENT.
The correct answer is A.
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I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
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