Question

Two circles touch Each Other externally sum of areas of the circle is 135π CM square and distance between their centres is 14 cm find the radii of the circles

Answer 1

$\pi \times {r1}^{2} + \pi {r2}^{2} = 135\pi$
${r1}^{2} + {r2}^{2} = 135$
${r1 + r2}^{2} - 2r1r2 = 135$
It is (r1+r2) ^2

$196 - 2r1r2 = 135$
$2r1r2 = 61$

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