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Answer C = 4.5km.
I agree the radius seems irrelevant.
Distance =54kmph*5 mins = 4.5kms.

Bunuel
A motorcycle stunts man belonging to a fair, rides over the vertical walls of a circular well at an average speed of 54 kph for 5 minutes. If the radius of the well is 5 meters then the distance traveled is:

A. 2.5 kms
B. 3.5 kms
C. 4.5 kms
D. 5.5 kms
E. None of the above

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I also did (54/60)*5 = 270/60 = 4.5, and was tempted to choose E, because I didn't know what to do with the radius...

I guess the fact that E exists should make us think that the radius is actually there to create confusion. I think that most of the time answers such as "none of the above" are wrong..
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Annoying. Wasted my time calculating the diameter.
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I felt the same way and I dont think we need to know the radius of cylinder. Unless there is a logic.

One logic question out this could be.. 'How many revolutions did the stunt man make'

Bunuel
A motorcycle stunts man belonging to a fair, rides over the vertical walls of a circular well at an average speed of 54 kph for 5 minutes. If the radius of the well is 5 meters then the distance traveled is:

A. 2.5 kms
B. 3.5 kms
C. 4.5 kms
D. 5.5 kms
E. None of the above

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Bunuel
A motorcycle stunts man belonging to a fair, rides over the vertical walls of a circular well at an average speed of 54 kph for 5 minutes. If the radius of the well is 5 meters then the distance traveled is:

A. 2.5 kms
B. 3.5 kms
C. 4.5 kms
D. 5.5 kms
E. None of the above

Kudos for a correct solution.

The radius info is irrelevant. Answer is 4.5kms.
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Bunuel
A motorcycle stunts man belonging to a fair, rides over the vertical walls of a circular well at an average speed of 54 kph for 5 minutes. If the radius of the well is 5 meters then the distance traveled is:

A. 2.5 kms
B. 3.5 kms
C. 4.5 kms
D. 5.5 kms
E. None of the above

Since distance = rate x time and 5 minutes = 5/60 = 1/12 hour, we have:

Distance = 54 x 1/12 = 54/12 = 9/2 = 4.5 km

Answer: C

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