If the ratio of area of two circles be displaystyle frac-36 -64- what is the ratio of their radii- displaystyle frac-6 -8- displaystyle frac-8-6- displaystyle frac-36 -64- displaystyle frac-64-36-

Question

If the ratio of area of two circles be  displaystyle frac-36 -64-  what is the ratio of their radii- displaystyle frac-6 -8-  displaystyle frac-8-6-  displaystyle frac-36 -64-  displaystyle frac-64-36-

Toppr Admin · Accepted Answer

A1A2-3664or-xA0-x3C0-r21-x3C0-r22-3664-x2234-xA0-r1r2-68

If the ratio of area of two circles be $\frac{36}{64}$ what is the ratio of their radii?
$\frac{6}{8}$
$\frac{8}{6}$
$\frac{36}{64}$
$\frac{64}{36}$

$\frac{A_{1}}{A_{2}} = \frac{36}{64}$
or $\frac{π r_{1}^{2}}{π r_{2}^{2}} = \frac{36}{64}$
$∴$ $\frac{r_{1}}{r_{2}} = \frac{6}{8}$

If the ratio of area of two circles be 3664 what is the ratio of their radii?688636646436

A1A2=3664or πr21πr22=3664∴ r1r2=68

If the ratio of area of two circles be $\frac{36}{64}$ what is the ratio of their radii?
$\frac{6}{8}$
$\frac{8}{6}$
$\frac{36}{64}$
$\frac{64}{36}$

$\frac{A_{1}}{A_{2}} = \frac{36}{64}$
or $\frac{π r_{1}^{2}}{π r_{2}^{2}} = \frac{36}{64}$
$∴$ $\frac{r_{1}}{r_{2}} = \frac{6}{8}$