The radii of two circles are 49 cm and 63 cm. How much longer is the circumference of the second circle than the first? [2 MARKS]

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Solution

Reason out: 1 Mark
Solution : 1 Mark

Circumference of first circle $= 2 π r = 2 π \times 49 = 308 c m$

Circumference of second circle $= 2 π r = 2 π \times 63 = 396 c m$

Subtracting the circumference of the circle with a smaller radius from the circle with a bigger radius we have 396 - 308 = 88 cms

So, the second circle is longer than the first circle by 88 cms.

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