Question

If the circumference of a circle is about 15.4 cm, estimate to the nearest whole number the diameter of the circle

Answer 1

The nearest whole number the diameter of the circle is 5.0 cm.

Given the following data:

• Circumference of a circle = 15.4 cm

To estimate to the nearest whole number the diameter of the circle:

In this exercise, you're required to solve for the diameter of a circle and round up its value to the nearest whole number.

How to calculate the circumference of a circle.

Mathematically, the circumference of a circle is given by the formula:

$Circumference = \pi D$

Where:

• D is the diameter of a circle.

Making D the subject of formula, we have:

$D =\frac{circumference}{\pi}$

Substituting the given parameters into the formula, we have;

$D =\frac{15.4}{3.142}$

D = 4.90 cm

To the nearest whole number:

D = 4.90 ≈ 5.0 cm

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