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26 Oct 2020, 10:59
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D
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:
96% (00:39) correct
4%
(01:32)
wrong
based on 45
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure shown, l1 and l2 are parallel. What is the value of x?
A. 5
B. 10
C. 15
D. 20
E. 30
Attachment:
2020-10-26_21-57-35.png [ 12.52 KiB | Viewed 1977 times ]
26 Oct 2020, 11:03
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IMO D
5x+40 and 2x are corresponding angles and the sum of corresponding angles equal 180.
7x+40 = 180, therefore x =20
Posted from my mobile device
5x+40 and 2x are corresponding angles and the sum of corresponding angles equal 180.
7x+40 = 180, therefore x =20
Posted from my mobile device
26 Oct 2020, 19:28
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Harsh9676
Hi Harsh 9676. Actually corresponding angles are equal and their sum is not 180. (Please refer to the highlighted statement)
The supplementary of 2x i.e 180 - 2x is corresponding to 5x + 40 and these 2 angles are equal.
Therefore 180 - 2x = 5x + 40 and hence x = 20.
Arun Kumar
