Mathematics 22 Online
OpenStudy (waheguru):

i dont understand this question can someone help me plz

OpenStudy (waheguru):

OpenStudy (anonymous):

c 40

OpenStudy (anonymous):

coz if u use this pir^2/2pir = 20 and then u cancel it u get r/2=20 then r=40

OpenStudy (anonymous):

the formulas for finding area and circumference

OpenStudy (anonymous):

do u get it?

OpenStudy (waheguru):

no

OpenStudy (waheguru):

how did u get the radius

OpenStudy (anonymous):

well in the question the area which is M we can write as $\pi$r^2 and then N is the circumference and we know that the formula is 2$\pi$r right?

OpenStudy (waheguru):

why can we write m as pi is it not the area?

OpenStudy (anonymous):

it is i wrote pir^2 but i dnt no y wen i post it , it didnt turn out rite

OpenStudy (waheguru):

/what do we get if we divide a circles area by its circumfrence

OpenStudy (anonymous):

if we divide the formulas we get r/2

OpenStudy (waheguru):

i am confused

OpenStudy (anonymous):

|dw:1314307853571:dw|