Question

The radius of a circle is 5 cm (to the nearest cm). What is the smallest value
that the circumference could have?

Answer 1

Answer: 31 cm.

explanation:

Given, Radius = 5 cm (near to)

this means the radius is near 5 cm. It can be 4.9, 4.99, 4.999.....or 5.01,5.001,5.001...... and so on.

So, the circumference of the circle is given by:-

Circumference = 2× $\pi$ × r

⇒ 2 × 22/7 × 5    (for the smallest value, we'll consider r as 5 and then round off the circumference to the smallest value)

⇒ 220/7 ≈ 31.43 cm

rounding off to the smallest integer, we have

Circumference = 31 cm.

Answer 2

The smallest value that the circumference could have is 10 $\pi$cm

Using Formula,

Circumference = 2 $\pi$ r

Radius = 5 cm

So, C = 2 $\pi$ 5

C = 10 $\pi$cm

Therefore circumference is 10 $\pi$cm.

To learn more about the circumference of circles, refer to :

https://brainly.com/question/2407529

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