Two circles which are not congruent touch externally. the sum of their area is 130¦Ðcm.square and distance between their centers is 14 cm. find radii of circles.

Answer 1

The two radii are r and 14-r, so

πr^2 + π(14-r)^2 = 160π
(assuming the strange character is supposed to be pi)

r^2 + 196 - 28r + r^2 = 160
Now just solve for r.