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GMATPrep - distance between centers

Expert replies
Source: — Problem Solving |

by kishore » Fri May 30, 2008 7:29 pm
Answer : A


(15 - pi)/2
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by AleksandrM » Fri May 30, 2008 7:53 pm
kishore,

I certainly appreciate the answer. However, as you may imagine, I already know what the correct answer is. I have posted this question here in order to get a more elaborate response, detailed solution, etc, etc, etc... all of the wonderful things that a forum such as this one usually provides.

Thanks for dropping a line though.
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by kishore » Fri May 30, 2008 8:11 pm
Alright,
Here you go...

Conveyor length - 15 ft

2 circular wheels 1ft in diameter

Distance between the centers of the circles ?

Ans) Distance between the centers =
(Conveyor len - ( circumference of semi circles) * no of semi circles )/2

(15 - (pi r) *2 )/2

diameter = 1 => r = .5 = 1/2

=> (15-(pi * 1/2)*2)2

=> (15-pi)/2
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