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OpenStudy (anonymous):
|dw:1401428365805:dw|
OpenStudy (anonymous):
george has 4.8m of timber he wishes to make the steps. He needs 5 steps to rise to a total height of 1.2mfrom the ground. he uses all the wood to constuct the steps , including supports (represented by the blue lines in the diagram)
OpenStudy (anonymous):
the lines represented by y are not blue lines
OpenStudy (anonymous):
@iambatman could you please help me on this one?
OpenStudy (anonymous):
i tried to use pythagorean theorem
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ganeshie8 (ganeshie8):
Can you take a screenshot and post the original diagram if possible
OpenStudy (anonymous):
yes i can
OpenStudy (anonymous):
OpenStudy (anonymous):
@ganeshie8
OpenStudy (anonymous):
use pythagorean theorem to the bigger triangle and find y
and then using pythagorean theorem again for a small triangle and find x
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OpenStudy (anonymous):
i tried to do that but i got a different answer
OpenStudy (anonymous):
4.8^2 + 1.2^2= (5y)^2
OpenStudy (anonymous):
is that how you find y?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
and how do you find x?
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OpenStudy (anonymous):
I got y=0.98something
OpenStudy (anonymous):
y^2-0.24^2= x^2
OpenStudy (anonymous):
you dont divide 0.98 by 5?
OpenStudy (anonymous):
I already did that
OpenStudy (anonymous):
x=0.24m
y=0.32m
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OpenStudy (anonymous):
these are the answers in the textbook
OpenStudy (anonymous):
oh I see, the length is not 4.8
OpenStudy (anonymous):
so to find the length
l= 4.8-1.2= 3.6
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
sorry dude, I don't get the answers u mentioned
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OpenStudy (anonymous):
there is a photo i have attached
OpenStudy (anonymous):
lets try this once again
OpenStudy (anonymous):
if im not mistaken
4.8= 10x + 2.4
OpenStudy (anonymous):
because it says that he used all his wood to construct all the blue lines
OpenStudy (anonymous):
where did you come up with this equation?
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OpenStudy (anonymous):
take the perimeter of the whole picture
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
that perimeter is equal to 4.8
OpenStudy (anonymous):
solving this equation will give you x=0.24
ganeshie8 (ganeshie8):
we should get below system right @d3v13
5x+5y+5x+1.2*2 = 4.8
x^2 + 0.24^2 = y^2
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OpenStudy (anonymous):
I'm sorry I misread the whole question earlier
OpenStudy (anonymous):
yes ganeshie is right
OpenStudy (anonymous):
thank you both @d3v13 @ganeshie8 for your help
ganeshie8 (ganeshie8):
this was a bit confusing earlier w/o the attachment lol
OpenStudy (anonymous):
im going to give you @d3v13 a medal could you please give @ganeshie8 one. i would really appreciate it if you did
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