Posted by Cassie on Monday, February 18, 2013 at 1:08am.
V = πr^2 h
= π (17^2)(27) = 24513.84
using 3.14 for π
V = 4.14(17^2)(27) = 24501.42
you are right!
You meant to put 3.14 on the secon part...right?
second part I meant....right??
You did the problem correctly. I am not sure how exactly you entered the numbers into the computer for pi, but it looks like with an answer of 24,523.71 the computer used an approzimation for pi based on the fraction 22/7.
22/7 = 3.142857....
If you plug the 22/7 instead of 3.14 you will get what the computer gets...
Thank you Jeff....
I find it very odd, that the "computer" would use 22/7 for the value of π.
Surely it would have better value than that built in
Even the cheapest calculator will use about 9 decimal places for accuracy.
It looks to me that whatever "input routine" they are using, needs an immediate update to bring it into the 21st century.
Reiny, Agreed, but that is what it appears to be using. I am guessing it was a software program and not the actual computer using that approximation.
What really irks me about pi is that most people know it is 3.1415....., but have NO idea what it actually represents....
BTW Cassie, please please always remember that pi is simply a circle's circumference divided by it's diameter. For every circle, no matter the size...
This is why it shows up in so many formulas for circles, cylinders, cones, etc.
ok ....thank you
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