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If the figure above shows 2 children playing on a seesaw, how high abo

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If the figure above shows 2 children playing on a seesaw, how high abo  [#permalink]

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New post 05 Sep 2018, 00:32
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68% (01:07) correct 32% (00:57) wrong based on 37 sessions

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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
image004.jpg [ 4.19 KiB | Viewed 375 times ]

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Re: If the figure above shows 2 children playing on a seesaw, how high abo  [#permalink]

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New post 05 Sep 2018, 03:40
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.
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If the figure above shows 2 children playing on a seesaw, how high abo  [#permalink]

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New post 05 Sep 2018, 10:44
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Bunuel wrote:
Image
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:
The attachment image004.jpg is no longer available


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)
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Re: If the figure above shows 2 children playing on a seesaw, how high abo  [#permalink]

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New post 08 Sep 2018, 23:48
I feel 2nd statement us sufficient. I suggests that x is the midpoint of the seesaw hence the height of x from ground has to be half of the height of the end point of the seesaw from the ground

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Re: If the figure above shows 2 children playing on a seesaw, how high abo &nbs [#permalink] 08 Sep 2018, 23:48
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