the radii of two circles are 19 and 9 respectively find the radius of the circle which has circumfrance equal to the sum of the circumfrance of the two circles with figure
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Answer:
28 cm
Step-by-step explanation:
Circumference of first circle = 2 × 22/7 × 19 cm = 836/7 cm
Circumference of second circle = 2 × 22/7 × 9 cm = 396/7 sq. cm
Now, Circumference of the third circle = 2 × 22/7 × r = 836/7 + 396/7 = 1232/7 cm
r = 1232/7 × 1/2 × 7/22 = 28 cm
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