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Motorcycle stunts

Expert replies
by harsh.champ » Wed Feb 17, 2010 5:05 am
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

The OA is C.
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Source: — Problem Solving |

by ajith » Wed Feb 17, 2010 5:49 am
harsh.champ wrote: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

The OA is C.
[spoiler]Total distance travelled = average speed * time = 54*5/60 = 4.5 Kms[/spoiler]
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by shashank.ism » Wed Feb 17, 2010 6:42 am
harsh.champ wrote: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

The OA is C.
Total distance travelled =( 54 /60) x5 = 4.5 kms. It doesn't matter what is the radius of the well as we can easily calculate distance with time and velocity.
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by tata » Wed Feb 17, 2010 7:29 am
harsh.champ wrote: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

The OA is C.
Do we really need the radius in this question? we have the speed and the time, distance can be calculated without the radius.
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by MartyMurray » Fri Dec 05, 2014 9:11 pm
Looks as if the radius is completely unnecessary, makes the question a little weird, or maybe I should say a little weirder as also "rides over the vertical walls" is funny way of putting what I think it means.
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