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In the figure, lines l and m are perpendicular. If a = 3b, then a – b

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Joined: 02 Sep 2009
Posts: 58320
In the figure, lines l and m are perpendicular. If a = 3b, then a – b  [#permalink]

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18 Jan 2019, 00:34
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Difficulty:

15% (low)

Question Stats:

86% (01:19) correct 14% (02:00) wrong based on 34 sessions

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In the figure, lines l and m are perpendicular. If a = 3b, then a – b = ?

A 22.5
B 35
C 45
D 67.5
E 75

Attachment:

2019-01-18_1133.png [ 9.62 KiB | Viewed 420 times ]

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Re: In the figure, lines l and m are perpendicular. If a = 3b, then a – b  [#permalink]

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18 Jan 2019, 03:03
a+b = 90
a = 3b
4b = 90
b = 22.5
a = 67.5
a-b = 45

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Re: In the figure, lines l and m are perpendicular. If a = 3b, then a – b  [#permalink]

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18 Jan 2019, 07:08
Bunuel wrote:

In the figure, lines l and m are perpendicular. If a = 3b, then a – b = ?

A 22.5
B 35
C 45
D 67.5
E 75

Attachment:
2019-01-18_1133.png

a+b=90
4b=90
b=22.5
a=67.5
a-b =45
IMO C
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Re: In the figure, lines l and m are perpendicular. If a = 3b, then a – b   [#permalink] 18 Jan 2019, 07:08
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