Mathematics
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OpenStudy (crashonce):
The three sides of a right angled triangle are of integral lengths which form an AP. Which of the following could be the length of one of the sides?
22, 58, 81, 91, 361 @mayankdevnani
11 years ago
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OpenStudy (mayankdevnani):
|dw:1416560149191:dw|
use pythagoras theorem
11 years ago
OpenStudy (crashonce):
ooooooo
11 years ago
OpenStudy (mayankdevnani):
\[\large \bf a^2+(a-d)^2=(a+d)^2\]
\[\large \bf a^2+a^2+d^2-2ad=a^2+d^2+2ad\]
11 years ago
OpenStudy (mayankdevnani):
\[\large \bf a^2=4ad\]
\[\large \bf a=4d\]
11 years ago
OpenStudy (crashonce):
im not sure how that helps tho
11 years ago
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OpenStudy (mayankdevnani):
if we take
a=22,then d=22/4=5.5
11 years ago
OpenStudy (mayankdevnani):
but we have to take only integral lengths
So, 22 is not the answer
11 years ago
OpenStudy (mayankdevnani):
understood ??
11 years ago
OpenStudy (crashonce):
ahhhhhhhhhh yes
11 years ago
OpenStudy (mayankdevnani):
so,next option :-
a=58,d=58/4=14.5
11 years ago
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OpenStudy (crashonce):
nope
11 years ago
OpenStudy (mayankdevnani):
so this is also not our answer
11 years ago
OpenStudy (crashonce):
none of them work...
11 years ago
OpenStudy (mayankdevnani):
next,a=81
then d=81/4=20.25
11 years ago
OpenStudy (mayankdevnani):
not our answer again !!
11 years ago
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OpenStudy (mayankdevnani):
then,a=91
So,d=91/4=22.75
11 years ago
OpenStudy (mayankdevnani):
not our answer
11 years ago
OpenStudy (mayankdevnani):
now last
a=361
d=361/4=90.25
11 years ago
OpenStudy (crashonce):
361 doesnt work either?
11 years ago
OpenStudy (mayankdevnani):
this is also not our answer
11 years ago
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OpenStudy (mayankdevnani):
i think no one satisifes
11 years ago
OpenStudy (mayankdevnani):
do you know the correct answer ??? @CrashOnce
11 years ago
OpenStudy (crashonce):
no i dont
11 years ago
OpenStudy (crashonce):
should we try again with a, a+d and a+2d
11 years ago
OpenStudy (mayankdevnani):
show your work !!
11 years ago
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OpenStudy (mayankdevnani):
and i am thinking !! wait.
11 years ago
OpenStudy (crashonce):
no it wont work
11 years ago
OpenStudy (mayankdevnani):
i think nothing is the answer
11 years ago
OpenStudy (mayankdevnani):
@Directrix
11 years ago
OpenStudy (mayankdevnani):
@dan815 @triciaal
11 years ago
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OpenStudy (mayankdevnani):
@jim_thompson5910 @ikram002p
11 years ago
OpenStudy (mayankdevnani):
@ganeshie8 @ganeshie8 plzzzz help...
11 years ago
OpenStudy (mayankdevnani):
@ganeshie8 @ganeshie8 @ganeshie8
11 years ago
OpenStudy (ikram002p):
well yes according to @mayankdevnani
a=4d
a+d=5d
a-d=3d
so , try all options ,
11 years ago
OpenStudy (ikram002p):
22,dont divide 3,5,4
58, dont divide 3,5,4
81,divide 3 , so it might be a-d
91, dont divide 3,4,5
361 dont divide 3,4,5,
11 years ago