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The question asks for the diameter of a circle given that the radius is 47 cm.

The relationship between the radius \( r \) and the diameter \( d \) of a circle is given by the formula:

\[
d = 2 \times r
\]

Substituting the given radius:

\[
d = 2 \times 47 \, \text{cm} = 94 \, \text{cm}
\]

So, the correct answer is **94 cm**.

Would you like more details or have any further questions?

Here are some related questions for further understanding:
1. If the diameter of a circle is 50 cm, what is the radius?
2. How is the circumference of a circle related to the diameter?
3. If the radius is doubled, how does the area of the circle change?
4. What is the circumference of a circle with a radius of 47 cm?
5. How does the diameter affect the area of the circle?

**Tip**: The diameter is always twice the radius, and the formula for circumference can also be written using the diameter as \( C = \pi \times d \).

If the radius of a circle is 47 cm, what is the diameter?

Learn how to calculate the diameter of a circle when the radius is given as 47 cm. The diameter is twice the radius, and using the formula, the diameter is 94 cm. This solution is suitable for students in Grade 5-7 studying geometry and circle properties.

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