Question

π is approximately 3.14 if the circumference of a circle is 15.7 cm, what is its diameter?

Explanation:

Step1: Recall the formula for circumference of a circle

The formula for the circumference \( C \) of a circle is \( C=\pi d \), where \( d \) is the diameter. We need to solve for \( d \), so we can rearrange the formula to \( d = \frac{C}{\pi} \).

Step2: Substitute the given values

We know that \( C = 15.7 \) cm and \( \pi\approx3.14 \). Substituting these values into the formula for \( d \), we get \( d=\frac{15.7}{3.14} \).

Step3: Perform the division

Calculating \( \frac{15.7}{3.14} \), we find that \( 15.7\div3.14 = 5 \).

Answer:

The diameter of the circle is \( 5 \) cm.