Question

the radius of a circle is 4 m. find its area to the nearest whole number.

Explanation:

Step1: Write the formula for the area of a circle

The formula for the area of a circle is \(A=\pi r^{2}\), where \(r\) is the radius.

Step2: Substitute the value of the radius into the formula

Given \(r = 4\) m, we substitute into the formula: \(A=\pi\times(4)^{2}=\pi\times16\).

Step3: Calculate the value

Taking \(\pi\approx3.14\), then \(A = 3.14\times16=50.24\).

Step4: Round to the nearest whole number

Rounding \(50.24\) to the nearest whole number, we look at the decimal part \(0.24\lt0.5\), so we round down.

Answer:

\(50\)