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Question
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm, is ______.
Fill in the Blanks
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Solution
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm, is 28 cm.
Explanation:
Circumference = π·d.
Sum of given circumferences = 36π + 20π
= 56π
= π·D
So diameter D = 56 cm and radius r = `D/2` = 28 cm.
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