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What's this problem I can't figure it out.

label Mathematics
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schedule 1 Day
account_balance_wallet $5

what fraction of the circular piece of metal was removed when the hole was made.

Apr 1st, 2015

where is the diagram please?............................................please best me

Mar 31st, 2015


Mar 31st, 2015
image.jpg

Also. When the washer is bolted into place, what is the are of the washer that is pressed against the object to which it is bolted? Use 3.14 for pi.

Mar 31st, 2015

fraction removed= (area of small circle/area of big circle)

= (3.14*5^2)/(3.14*10^2)

=1/4..............................please best me

Mar 31st, 2015

area of washer pressed= sqrt(2)*4sqrt(2)

= 4*2

=8 square units..............................please best me


Mar 31st, 2015

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