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22 Feb 2018, 20:49
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
92% (00:42) correct
8%
(00:31)
wrong
based on 72
sessions
History
Date
Time
Result
Not Attempted Yet
How many square floor tiles with each side x will it take to cover a rectangular kitchen floor?
(1) The width of the kitchen floor is 10x.
(2) The length of the kitchen floor is 30x.
(1) The width of the kitchen floor is 10x.
(2) The length of the kitchen floor is 30x.
23 Feb 2018, 00:11
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Bunuel
Statement 1
Width is 10x, so from width side, we would need to place 10 small square tiles (since each has a side x), but since we don't know the length, we cannot say how many tiles should be placed along the length. Not sufficient.
Statement 2
Length is 30x, so from length side, we would need to place 30 small square tiles (since each has a side x), but since we don't know the width, we cannot say how many tiles should be placed along the width. Not sufficient.
Combining the statements,
exactly 10 tiles needed along the width and exactly 30 tiles needed along the length. So total small square tiles required = 10*30 = 300.
Sufficient.
Hence C answer
23 Feb 2018, 00:19
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Bunuel
For finding out the tiles required we need to know length and the breadth of the rectangle
1) only breath no length
2) only length no breadth
combining we have both l and b and thus we can find a unique value
(C) imo
