When the radius of a circle is multiplied by a factor of 3 33, by what factor will the circumference of the circle change?

1 Answer
Shubh
Apr 1, 2018

[C'(New Circumference)]/[C(Real Circumference)]=3/1=3:1

Explanation:

let the original radius be r
as, the factors of 3 & 33 is 3.
i.e. so, new radius = 3r
original circumference = 2pir
new circumference = 2pi(3r)=6pir
so, [C'(New Circumference)]/[C(Real Circumference)]=3/1=3:1

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