lewishill63mlewis lewishill63mlewis

01-06-2017
Mathematics

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what happens to the circumference of a circle if the radius is doubled

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anonymous79 anonymous79

01-06-2017

let radius be r initially
so circumference initially= 2rpi
when r is doubled,
radius = 2r
so circumference in the end= 4rpi
how many folds of increase? =4rpi/2rpi=2 times increase

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