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in a set of stairs

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by sanju09 » Wed Mar 09, 2011 4:41 am
If the two floors in a certain building are 9 feet apart, how many steps are there in a set of stairs that extends from the first floor to the to the second floor of the building?

I. Each step is ¾ foot high.

II. Each step is 1 foot wide.



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by Anurag@Gurome » Wed Mar 09, 2011 4:57 am
(1) Each step is ¾ foot high implies required number of steps = 9 / (3/4) = 12
So, (1) is SUFFICIENT.

(2) The width of the step doesn't help us to find the required number of steps.
So, (2) is NOT SUFFICIENT.

The correct answer is A.
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