Question

Please help its math

Answer 1

The diameter is 13.60 feet.

The circumstance is approximately 42.70 feet.

Look at the attached picture

Hope it will help you

Answer 2

Let the length of the radius = r feet.

Diameter = 2r = 2 x 6.8 = 13.6 feet

Circumference = 2
`\pi`r = 2 x 3.14 x 6.8 = 42.704 feet = approx. 42.7 feet