Mathematics
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Calculate the circle circumfrance's upper bound if the area is 400cm(square)

5 months ago
lock:

5 months ago
lock:

@theDeviliscoming

5 months ago

is there a picture

5 months ago
lock:

nope

5 months ago
lock:

The only given thing is 400 cm^2 area And they want you to calculate it in upper bound and lower bound..?

5 months ago
lock:

they didnt give me the raduis though

5 months ago
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nvm i think its r≈11.28

5 months ago
lock:

so is it 11.20 and 11.30? @Shadow

5 months ago
jhonyy9:

do you know formula for circumference of a circle ?

5 months ago
jhonyy9:

area = 400 cm^2 you need to know formula of area of a circle too

5 months ago
jhonyy9:

from formula of area you can calcule the radius value and just substitute in place of radius inside formula of circumference hope helped

5 months ago
jhonyy9:

area =pi*r^2 400 = 3,14 *r^2 r^2 = 400/3,14 = 127,38 r = sqrt(127,38 = 11,28 cm yes you yre right with this

5 months ago
jhonyy9:

you are right sorry

5 months ago
jhonyy9:

and now just use this value of radius and calcule easy the circumference value

5 months ago
jhonyy9:

ok. ?

5 months ago
jhonyy9:

do you know formula for circumference ?

5 months ago
jhonyy9:

C = 2*pi*r

5 months ago
jhonyy9:

i need to go now it"s ok ?

5 months ago
jhonyy9:

lock ???

5 months ago
jhonyy9:

C=2*3,14*11,28 = ?

5 months ago
jhonyy9:

bye bye

5 months ago
lock:

thank you ! @jhonyy9

5 months ago