This passerine, native to northern Australia, averages just six inches long, but can count itself among the most colorful birds around, with its brilliant and distinctive blocked pattern: green wings, BRIGHT PURPLE chest, YELLOW belly, and turquoise headband.In the Kimberley, the Gouldian finch's presence and abundance is linked to sound fire management practices. This is important as it requires a variety of grass species as a seed source throughout the year and breeds in mature woodlands that contain stands of large, hollow-bearing trees.optionalMathsAreas Related to CirclesCircumference and Area of CircleThe radii of TWO circles ar...MATHSThe radii of two circles are 19cm and 9cm respectively. Find the radius of the circle which has a circumference equal to the sum of the circumferences of the two circles.MEDIUMShareStudy laterANSWERLet the radius of required circle =r cmRadius of 1st circle r 1 =9 cmRadius of 2nd circle r 2 =19 cmAs per the QUESTION Circumference of the required circle = Sum of circumference of two circlesCircumference of small circle =2πr 1 =2π×9 =18πCircumference of small circle =2πr 2 =2π×19 =38πNow,Circumference of the required circle = Sum of circumference of two circles2πr=18π+38π2πr=58πr= 2π56π r=28 cm