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05 Sep 2018, 00:32
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:15) correct
30%
(01:38)
wrong
based on 82
sessions
History
Date
Time
Result
Not Attempted Yet
If the figure above shows 2 children playing on a seesaw, how high above the level ground is child B's seat?
(1) Child A is holding the seesaw at a 30 degree angle with the end touching the ground.
(2) Point x is 2 feet above the ground and is at the midpoint of the seesaw.
Attachment:
image004.jpg [ 4.19 KiB | Viewed 2233 times ]
05 Sep 2018, 03:40
Kudos
Bookmarks
Statement (1) Child A is holding the seesaw at a 30 degree angle with the end touching the ground.
With just the angle, we cannot calculate the height of the seat B. Insufficient
Statement (2) Point x is 2 feet above the ground and is at the midpoint of the seesaw.
This statement may suggest to apply the idea of similar triangles and find the height : 2/L = H/2L => H = 4 (L is the hyp of smaller rt triangle)
But, in my opinion for this to work, the end A of the see saw should touch the ground. It doesn't look like that from the figure, so Insufficient.
Combining St1 & St2, we can easily calculate the height using pythagorean triplets. Answer should be C.
With just the angle, we cannot calculate the height of the seat B. Insufficient
Statement (2) Point x is 2 feet above the ground and is at the midpoint of the seesaw.
This statement may suggest to apply the idea of similar triangles and find the height : 2/L = H/2L => H = 4 (L is the hyp of smaller rt triangle)
But, in my opinion for this to work, the end A of the see saw should touch the ground. It doesn't look like that from the figure, so Insufficient.
Combining St1 & St2, we can easily calculate the height using pythagorean triplets. Answer should be C.
05 Sep 2018, 10:44
Kudos
Bookmarks
Bunuel
Question stem:- BC=? (Refer enclosed diagram)
St1:- Child A is holding the seesaw at a 30 degree angle with the end touching the ground.
No information about any of the sides of a triangle.
Insufficient.
St2:- Point x is 2 feet above the ground and is at the midpoint of the seesaw.
No information about the position of point A.
Insufficient.
Combined, Please refer the diagram.
Ans. (C)
Attachments
similarity.JPG [ 35.59 KiB | Viewed 1916 times ]
