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A man walks at a rate of 10 mph...

This topic has 2 expert replies and 0 member replies

A man walks at a rate of 10 mph...

Post Mon Jan 08, 2018 7:49 am
A man walks at a rate of 10 mph. After every 10 miles, he rests for 6 minutes. How much time does he take to walk 50 miles?

A. 300
B. 318
C. 322
D. 324
E. 330

The OA is D.

I don't have clear this PS question, I appreciate if any expert explain it for me because if he rests for 6 minutes every 10 miles, he should stop to rest 4 times, that's mean 24 minutes, then

For each 10 miles, his time is, (60+6)=66 minutes but for the last 10 miles (40 to 50) will be 60 minutes, finally the total time will be,

66(10 miles)+66(20 miles)+66(30 miles)+66(40 miles)+60(50 miles)=324.

Is it correct my solution? Thank you so much.

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GMAT/MBA Expert

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Post Mon Jan 08, 2018 7:52 am
That's a perfectly valid approach!

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GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMAT’s FREE 60-Day Study Guide and reach your target score in 2 months!

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Post Fri Jan 12, 2018 8:25 am
AAPL wrote:
A man walks at a rate of 10 mph. After every 10 miles, he rests for 6 minutes. How much time does he take to walk 50 miles?

A. 300
B. 318
C. 322
D. 324
E. 330

The OA is D.

I don't have clear this PS question, I appreciate if any expert explain it for me because if he rests for 6 minutes every 10 miles, he should stop to rest 4 times, that's mean 24 minutes, then

For each 10 miles, his time is, (60+6)=66 minutes but for the last 10 miles (40 to 50) will be 60 minutes, finally the total time will be,

66(10 miles)+66(20 miles)+66(30 miles)+66(40 miles)+60(50 miles)=324.

Is it correct my solution? Thank you so much.
As Brent noted, your approach is perfectly valid. Alternatively, you could think about it like this

If you're walking at 10mph, it'll take you 5 hours to go 50 miles without stopping. 5 hours =5*60 = 300 minutes.
If you stop every 10 miles, you'll stop 4 times. At 6 minutes of resting per stop, you'll rest a total of 4*6 = 24 minutes.
Total time = 300 + 24 =324. The answer is D

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