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Radius of the circle is given by (r) = 5 cm.

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$\"\"$ (Multiply each side by 2)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

Let C be the circumference of the circle.

$\"\"$ (Apply circumference formula)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply) $\"\"$

The value of the diameter $\"\"$ and circumference $\"\"$ .