Question

ratio of radii of two circle is 3: 4 what is the ratio of area of semicircles of these two

Answer 1

#RAM RAM ji ❤^_^


ĀNSWĒR ⏬⏬


$\huge given \\ \\ ratio \: of \: radii \: of\: two \: given \: circles$
=3:4

$so \: assumed \: the \: radii \: of \: two \: circles \: \\ can \: be =$

3R and 4R

Area of cirlcle is πr^2

So,
$area \: of \: both \: circles =$

π3R^2 and π4R^2

i.e 9πR^2 and 16 πR^2

so, ratio of area of circles =

$9\pi {r}^{2} \div 16\pi {r}^{2}$
i.e

$\huge \frac{9}{16}$
____THanks ,☺☺☺✔


#NAVI ❤ HARYANVI ♠

Answer 2

Answer:

Area of semi circle = 3.5 : 8

Step-by-step explanation:

Let the area of first circle be A1 and the area of second circle A2.

Formula of area of a semi circle = π r^2/2

Let the radius of first circle be r1 and second circle r2

Ratio of radius = 3:4

A1/A2 = π (r1^2/2)/ π (r2^2/2)

A1/A2 = π(3^2/2)/π (4^2/2)

A1/A2 = (3^2/2)/(4^2/2) [π gets canceled]

A1/A2 = (9/2)/(16/2)

A1/A2 = 3.5/8

Area of semi circle is 3.5/8

                                = 3.5:8

Hope this answer helps. Plz follow and thank me and mark me as the brainliest. Plzzzzzzz