Question

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

Answer 1

@Shadow

Answer 2

@theDeviliscoming

Answer 3

is there a picture

Answer 4

nope

Answer 5

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

Answer 6

they didnt give me the raduis though

Answer 7

nvm i think its r≈11.28

Answer 8

so is it 11.20 and 11.30? @Shadow

Answer 9

do you know formula for circumference of a circle ?

Answer 10

area = 400 cm^2

you need to know formula of area of a circle too

Answer 11

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

hope helped

Answer 12

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

Answer 13

you are right

sorry

Answer 14

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

Answer 15

ok. ?

Answer 16

do you know formula for circumference ?

Answer 17

C = 2*pi*r

Answer 18

i need to go

now it"s ok ?

Answer 19

lock ???

Answer 20

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

Answer 21

bye bye

Answer 22

thank you ! @jhonyy9