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19 Aug 2019, 00:39
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C
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Difficulty:
5%
(low)
Question Stats:
91% (01:08) correct
9%
(01:08)
wrong
based on 45
sessions
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A certain rectangular window is half as long as it is wide. If its area is 20 feet, then its dimensions in feet are
A. \(\sqrt{10}\) by \(\sqrt{10}\)
B. \(\sqrt{5}\) by \(\sqrt{2}\)
C. \(2\sqrt{10}\) by \(\sqrt{10}\)
D. \(2\sqrt{5}\) by \(\sqrt{10}\)
E. 6 2/3 by 3 1/3
A. \(\sqrt{10}\) by \(\sqrt{10}\)
B. \(\sqrt{5}\) by \(\sqrt{2}\)
C. \(2\sqrt{10}\) by \(\sqrt{10}\)
D. \(2\sqrt{5}\) by \(\sqrt{10}\)
E. 6 2/3 by 3 1/3
19 Aug 2019, 00:40
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19 Aug 2019, 02:43
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Bunuel
Given:
1. A certain rectangular window is half as long as it is wide.
2. Its area is 20 feet.
Asked: Its dimensions in feet are
Length = Width/2
Length < Width
It is abnormal to say A certain rectangular window is half as long as it is wide. but it does not affect the solution.
Area = Length * Width = 20
Width ^2 = 40
Width = \(\sqrt{40} = 2\sqrt{10}\)
Length =\(2\sqrt{10}/2 = \sqrt{10}\)
IMO C
