CBSE Class 7 Answered
Find the circumference of a circular disc with diameter 9 cm.
Asked by Topperlearning User | 25 Nov, 2013, 01:15: AM
Expert Answer
The formula for finding the circumference of a circle is:
Circumference of a circle = 2
r
Here, diameter (d) = 9 cm
Thus, radius (r) = 
= 4.5 cm
Then, Circumference = 2 x 3.14 x 4.5 ( = 3.14)
= 2 x 14.13
= 28.26 cm
So, the circumference of the circle = 28.26 cm
Answered by | 25 Nov, 2013, 03:15: AM
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