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Question

The circumference of a circle exceeds the diameter by 16.8 cm. Find the circumference of the circle.


Solution

Let the radius of a circle be r cm.

As per the question, 2πr=2r+16.8

2×227×r=2r+16.8

44r=14r+117.6

30r=117.6

r=3.92 cm

Now the circumference is 2πr=2×227×3.92=24.64 cm


Mathematics
RD Sharma
Standard X

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