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GMAT prep PS question

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GMAT prep PS question

by mlane25269 » Tue Apr 21, 2009 2:57 pm
Can someone explain? Thanks!
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by kanha81 » Tue Apr 21, 2009 4:19 pm
What was I thinking!!!
Last edited by kanha81 on Tue Apr 21, 2009 4:36 pm, edited 1 time in total.
Want to Beat GMAT.
Always do what you're afraid to do. Whoooop GMAT
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by lilu » Tue Apr 21, 2009 4:30 pm
Circumference of the circle=2Pr=2*P*100=2*100*3.14=628
Now,we have 1/4 of that circle-->628/4=157
And we need to add two sides=157+100+100=357
The more you look, the more you see.
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by gmat740 » Tue Apr 21, 2009 4:49 pm
The question asks for perimeter

P = 0.5[pi*r] + 2*r

r =100

P = 100[ pi/2 + 2]

pi =3.14. so pi/2 =1.57

P = 100[1.57+2] = 100[3.57] = 357

Hope this is a simpler method
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