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[SOLVED] gre,ge.2 similiar triangles

karush

Well-known member
Jan 31, 2012
2,773
View attachment 9548
This seems to be rather common GRE Exam Question
Which appears to harder that what it is
It looks like a similar triagle solution
$\dfrac{800}{7000}=\dfrac{x}{1400}$
 
Last edited:

tkhunny

Well-known member
MHB Math Helper
Jan 27, 2012
267
This seems to be rather common GRE Exam Question
Which appears to harder that what it is
It looks like a similar triagle solution
$\dfrac{800}{7000}=\dfrac{x}{1400}$
800/7000 = x/1400

It's a little bit of smoke.

80/700 = x/1400

8/70 = x/1400

8/7 = x/140

8/1 = x/20

Look easier?

Anyone whose first move is to produce 112,000 = 700x simply isn't paying attention.
 

HallsofIvy

Well-known member
MHB Math Helper
Jan 29, 2012
1,151
"Anyone whose first move is to produce 112,000 = 700x" solves problems like this by immediately plugging numbers into a calculator!
 

karush

Well-known member
Jan 31, 2012
2,773
800/7000 = x/1400

It's a little bit of smoke.

80/700 = x/1400

8/70 = x/1400

8/7 = x/140

8/1 = x/20

Look easier?

Anyone whose first move is to produce 112,000 = 700x simply isn't paying attention.
actually the answer is
x=160